18990696164 has 12 divisors (see below), whose sum is σ = 36254965488. Its totient is φ = 8632134600.

The previous prime is 18990696163. The next prime is 18990696167. The reversal of 18990696164 is 46169609981.

It is not an unprimeable number, because it can be changed into a prime (18990696163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215803322 + ... + 215803409.

It is an arithmetic number, because the mean of its divisors is an integer number (3021247124).

Almost surely, 2^18990696164 is an apocalyptic number.

It is an amenable number.

18990696164 is a deficient number, since it is larger than the sum of its proper divisors (17264269324).

18990696164 is a wasteful number, since it uses less digits than its factorization.

18990696164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431606746 (or 431606744 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 59.

The spelling of 18990696164 in words is "eighteen billion, nine hundred ninety million, six hundred ninety-six thousand, one hundred sixty-four".