18688353474 has 32 divisors (see below), whose sum is σ = 43625097216. Its totient is φ = 5225922000.

The previous prime is 18688353451. The next prime is 18688353491. The reversal of 18688353474 is 47435388681.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 4731652 + ... + 4735599.

It is an arithmetic number, because the mean of its divisors is an integer number (1363284288).

Almost surely, 2^18688353474 is an apocalyptic number.

18688353474 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18688353474 is an abundant number, since it is smaller than the sum of its proper divisors (24936743742).

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

18688353474 is a wasteful number, since it uses less digits than its factorization.

18688353474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9467310.

The product of its digits is 15482880, while the sum is 57.

The spelling of 18688353474 in words is "eighteen billion, six hundred eighty-eight million, three hundred fifty-three thousand, four hundred seventy-four".