18769447872 has 112 divisors (see below), whose sum is σ = 63061413120. Its totient is φ = 5362695936.

The previous prime is 18769447849. The next prime is 18769447913. The reversal of 18769447872 is 27874496781.

18769447872 is a `hidden beast` number, since 1 + 8 + 7 + 6 + 94 + 478 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 763758 + ... + 787949.

Almost surely, 2^18769447872 is an apocalyptic number.

18769447872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18769447872 is an abundant number, since it is smaller than the sum of its proper divisors (44291965248).

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

18769447872 is a wasteful number, since it uses less digits than its factorization.

18769447872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551735 (or 1551719 counting only the distinct ones).

The product of its digits is 37933056, while the sum is 63.

The spelling of 18769447872 in words is "eighteen billion, seven hundred sixty-nine million, four hundred forty-seven thousand, eight hundred seventy-two".