18698464432 has 40 divisors (see below), whose sum is σ = 37847577600. Its totient is φ = 8938616640.

The previous prime is 18698464427. The next prime is 18698464457. The reversal of 18698464432 is 23446489681.

It is a super-2 number, since 2×18698464432² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185932 + ... + 268267.

It is an arithmetic number, because the mean of its divisors is an integer number (946189440).

Almost surely, 2^18698464432 is an apocalyptic number.

It is an amenable number.

18698464432 is an abundant number, since it is smaller than the sum of its proper divisors (19149113168).

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

18698464432 is a wasteful number, since it uses less digits than its factorization.

18698464432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454321 (or 454315 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 55.

The spelling of 18698464432 in words is "eighteen billion, six hundred ninety-eight million, four hundred sixty-four thousand, four hundred thirty-two".