19638892136 has 32 divisors (see below), whose sum is σ = 37183199040. Its totient is φ = 9723452928.

The previous prime is 19638892123. The next prime is 19638892187. The reversal of 19638892136 is 63129883691.

It is a happy number.

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, 3092981 + ... + 3099323.

It is an arithmetic number, because the mean of its divisors is an integer number (1161974970).

Almost surely, 2^19638892136 is an apocalyptic number.

It is an amenable number.

19638892136 is a deficient number, since it is larger than the sum of its proper divisors (17544306904).

19638892136 is a wasteful number, since it uses less digits than its factorization.

19638892136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10073 (or 10069 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 56.

The spelling of 19638892136 in words is "nineteen billion, six hundred thirty-eight million, eight hundred ninety-two thousand, one hundred thirty-six".