18748672039440 has 320 divisors, whose sum is σ = 76185081937920. Its totient is φ = 4147171591680.

The previous prime is 18748672039423. The next prime is 18748672039463. The reversal of 18748672039440 is 4493027684781.

18748672039440 is a `hidden beast` number, since 1 + 8 + 7 + 486 + 7 + 20 + 3 + 94 + 40 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19531144 + ... + 20468583.

It is an arithmetic number, because the mean of its divisors is an integer number (238078381056).

Almost surely, 2^{18748672039440} is an apocalyptic number.

18748672039440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18748672039440 is an abundant number, since it is smaller than the sum of its proper divisors (57436409898480).

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

18748672039440 is a wasteful number, since it uses less digits than its factorization.

18748672039440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39999787 (or 39999775 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 63.

The spelling of 18748672039440 in words is "eighteen trillion, seven hundred forty-eight billion, six hundred seventy-two million, thirty-nine thousand, four hundred forty".