18728798976 has 54 divisors (see below), whose sum is σ = 53999751260. Its totient is φ = 6242932224.

The previous prime is 18728798923. The next prime is 18728798983. The reversal of 18728798976 is 67989782781.

It is a super-2 number, since 2×18728798976² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4062106 + ... + 4066713.

Almost surely, 2^18728798976 is an apocalyptic number.

18728798976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18728798976 is an abundant number, since it is smaller than the sum of its proper divisors (35270952284).

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

18728798976 is an equidigital number, since it uses as much as digits as its factorization.

18728798976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8128841 (or 8128824 counting only the distinct ones).

The product of its digits is 170698752, while the sum is 72.

The spelling of 18728798976 in words is "eighteen billion, seven hundred twenty-eight million, seven hundred ninety-eight thousand, nine hundred seventy-six".