18927977376 has 96 divisors (see below), whose sum is σ = 61946131968. Its totient is φ = 4916355840.

The previous prime is 18927977363. The next prime is 18927977399. The reversal of 18927977376 is 67377972981.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1272910 + ... + 1287693.

It is an arithmetic number, because the mean of its divisors is an integer number (645272208).

Almost surely, 2^18927977376 is an apocalyptic number.

18927977376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18927977376 is an abundant number, since it is smaller than the sum of its proper divisors (43018154592).

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

18927977376 is a wasteful number, since it uses less digits than its factorization.

18927977376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560634 (or 2560626 counting only the distinct ones).

The product of its digits is 56010528, while the sum is 66.

The spelling of 18927977376 in words is "eighteen billion, nine hundred twenty-seven million, nine hundred seventy-seven thousand, three hundred seventy-six".