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18870575568 = 2431330241307
BaseRepresentation
bin10001100100110001…
…100010000111010000
31210201010022120012020
4101210301202013100
5302121331404233
612400301531440
71235426150205
oct214461420720
953633276166
1018870575568
118003a477a9
1237a7873b80
131a196c3c60
14cb02c7cac
15756a219b3
hex464c621d0

18870575568 has 40 divisors (see below), whose sum is σ = 52498910688. Its totient is φ = 5806330752.

The previous prime is 18870575567. The next prime is 18870575573. The reversal of 18870575568 is 86557507881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18870575567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15120030 + ... + 15121277.

Almost surely, 218870575568 is an apocalyptic number.

It is an amenable number.

18870575568 is an abundant number, since it is smaller than the sum of its proper divisors (33628335120).

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

18870575568 is a wasteful number, since it uses less digits than its factorization.

18870575568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30241331 (or 30241325 counting only the distinct ones).

The product of its (nonzero) digits is 18816000, while the sum is 60.

The spelling of 18870575568 in words is "eighteen billion, eight hundred seventy million, five hundred seventy-five thousand, five hundred sixty-eight".

Divisors: 1 2 3 4 6 8 12 13 16 24 26 39 48 52 78 104 156 208 312 624 30241307 60482614 90723921 120965228 181447842 241930456 362895684 393136991 483860912 725791368 786273982 1179410973 1451582736 1572547964 2358821946 3145095928 4717643892 6290191856 9435287784 18870575568