18798901056 has 84 divisors (see below), whose sum is σ = 58028575332. Its totient is φ = 5784274944.

The previous prime is 18798901031. The next prime is 18798901057. The reversal of 18798901056 is 65010989781.

It can be written as a sum of positive squares in 2 ways, for example, as 9541382400 + 9257518656 = 97680^2 + 96216^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18798900993 and 18798901011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18798901057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1247781 + ... + 1262756.

It is an arithmetic number, because the mean of its divisors is an integer number (690816373).

Almost surely, 2^18798901056 is an apocalyptic number.

18798901056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18798901056 is an abundant number, since it is smaller than the sum of its proper divisors (39229674276).

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

18798901056 is a wasteful number, since it uses less digits than its factorization.

18798901056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510568 (or 2510555 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 54.

The spelling of 18798901056 in words is "eighteen billion, seven hundred ninety-eight million, nine hundred one thousand, fifty-six".