18995664900 has 72 divisors (see below), whose sum is σ = 56301333984. Its totient is φ = 4941958400.

The previous prime is 18995664889. The next prime is 18995664917. The reversal of 18995664900 is 946659981.

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, 759882 + ... + 784481.

It is an arithmetic number, because the mean of its divisors is an integer number (781962972).

Almost surely, 2^18995664900 is an apocalyptic number.

18995664900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18995664900 is an abundant number, since it is smaller than the sum of its proper divisors (37305669084).

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

18995664900 is a wasteful number, since it uses less digits than its factorization.

18995664900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544421 (or 1544414 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 57.

The spelling of 18995664900 in words is "eighteen billion, nine hundred ninety-five million, six hundred sixty-four thousand, nine hundred".