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20740504428 = 2232782303589
BaseRepresentation
bin10011010100001110…
…101111101101101100
31222112102220210100200
4103110032233231230
5314434032120203
613310020553500
71332653243640
oct232416575554
958472823320
1020740504428
118883523a56
124029b52890
131c56c29337
14100a7a4c20
15815c8e9a3
hex4d43afb6c

20740504428 has 36 divisors (see below), whose sum is σ = 59917013520. Its totient is φ = 5925858336.

The previous prime is 20740504423. The next prime is 20740504439. The reversal of 20740504428 is 82440504702.

20740504428 is a `hidden beast` number, since 207 + 4 + 0 + 5 + 0 + 442 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 20740504392 and 20740504401.

It is not an unprimeable number, because it can be changed into a prime (20740504423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41151543 + ... + 41152046.

Almost surely, 220740504428 is an apocalyptic number.

20740504428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20740504428 is an abundant number, since it is smaller than the sum of its proper divisors (39176509092).

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

20740504428 is a wasteful number, since it uses less digits than its factorization.

20740504428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82303606 (or 82303601 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 36.

The spelling of 20740504428 in words is "twenty billion, seven hundred forty million, five hundred four thousand, four hundred twenty-eight".

Divisors: 1 2 3 4 6 7 9 12 14 18 21 28 36 42 63 84 126 252 82303589 164607178 246910767 329214356 493821534 576125123 740732301 987643068 1152250246 1481464602 1728375369 2304500492 2962929204 3456750738 5185126107 6913501476 10370252214 20740504428