18374972440 has 64 divisors (see below), whose sum is σ = 45775445760. Its totient is φ = 6582069120.

The previous prime is 18374972411. The next prime is 18374972479. The reversal of 18374972440 is 4427947381.

It is a super-2 number, since 2×18374972440² (a number of 21 digits) contains 22 as substring.

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, 282172 + ... + 341131.

It is an arithmetic number, because the mean of its divisors is an integer number (715241340).

Almost surely, 2^18374972440 is an apocalyptic number.

18374972440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18374972440 is an abundant number, since it is smaller than the sum of its proper divisors (27400473320).

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

18374972440 is a wasteful number, since it uses less digits than its factorization.

18374972440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623392 (or 623388 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 49.

The spelling of 18374972440 in words is "eighteen billion, three hundred seventy-four million, nine hundred seventy-two thousand, four hundred forty".