18771944968 has 32 divisors (see below), whose sum is σ = 41312779200. Its totient is φ = 7827682752.

The previous prime is 18771944959. The next prime is 18771944977. The reversal of 18771944968 is 86944917781.

It is an interprime number because it is at equal distance from previous prime (18771944959) and next prime (18771944977).

It is a Smith number, since the sum of its digits (64) 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, 4527838 + ... + 4531981.

It is an arithmetic number, because the mean of its divisors is an integer number (1291024350).

Almost surely, 2^18771944968 is an apocalyptic number.

It is an amenable number.

18771944968 is an abundant number, since it is smaller than the sum of its proper divisors (22540834232).

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

18771944968 is a wasteful number, since it uses less digits than its factorization.

18771944968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9059869 (or 9059865 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 64.

The spelling of 18771944968 in words is "eighteen billion, seven hundred seventy-one million, nine hundred forty-four thousand, nine hundred sixty-eight".