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21042534744 = 23327113795551
BaseRepresentation
bin10011100110001110…
…111001100101011000
32000022111020112001200
4103212032321211120
5321043342102434
613400010314200
71343311410540
oct234616714530
960274215050
1021042534744
118a18a64890
1240b3128960
131ca46882ba
141038946320
15832550199
hex4e63b9958

21042534744 has 96 divisors (see below), whose sum is σ = 71052733440. Its totient is φ = 5465592000.

The previous prime is 21042534727. The next prime is 21042534767. The reversal of 21042534744 is 44743524012.

21042534744 is a `hidden beast` number, since 2 + 10 + 42 + 534 + 74 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 21042534699 and 21042534708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1892232 + ... + 1903319.

It is an arithmetic number, because the mean of its divisors is an integer number (740132640).

Almost surely, 221042534744 is an apocalyptic number.

21042534744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21042534744 is an abundant number, since it is smaller than the sum of its proper divisors (50010198696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21042534744 is a wasteful number, since it uses less digits than its factorization.

21042534744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3795581 (or 3795574 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 36.

The spelling of 21042534744 in words is "twenty-one billion, forty-two million, five hundred thirty-four thousand, seven hundred forty-four".

Divisors: 1 2 3 4 6 7 8 9 11 12 14 18 21 22 24 28 33 36 42 44 56 63 66 72 77 84 88 99 126 132 154 168 198 231 252 264 308 396 462 504 616 693 792 924 1386 1848 2772 5544 3795551 7591102 11386653 15182204 22773306 26568857 30364408 34159959 41751061 45546612 53137714 68319918 79706571 83502122 91093224 106275428 125253183 136639836 159413142 167004244 212550856 239119713 250506366 273279672 292257427 318826284 334008488 375759549 478239426 501012732 584514854 637652568 751519098 876772281 956478852 1002025464 1169029708 1503038196 1753544562 1912957704 2338059416 2630316843 3006076392 3507089124 5260633686 7014178248 10521267372 21042534744