Base | Representation |
---|---|
bin | 10011100110001110… |
… | …111001100101011000 |
3 | 2000022111020112001200 |
4 | 103212032321211120 |
5 | 321043342102434 |
6 | 13400010314200 |
7 | 1343311410540 |
oct | 234616714530 |
9 | 60274215050 |
10 | 21042534744 |
11 | 8a18a64890 |
12 | 40b3128960 |
13 | 1ca46882ba |
14 | 1038946320 |
15 | 832550199 |
hex | 4e63b9958 |
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".
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