18686703372 has 24 divisors (see below), whose sum is σ = 45498061056. Its totient is φ = 5958079248.

The previous prime is 18686703367. The next prime is 18686703383. The reversal of 18686703372 is 27330768681.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33852448 + ... + 33852999.

It is an arithmetic number, because the mean of its divisors is an integer number (1895752544).

Almost surely, 2^18686703372 is an apocalyptic number.

18686703372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18686703372 is an abundant number, since it is smaller than the sum of its proper divisors (26811357684).

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

18686703372 is a wasteful number, since it uses less digits than its factorization.

18686703372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67705477 (or 67705475 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 18686703372 in words is "eighteen billion, six hundred eighty-six million, seven hundred three thousand, three hundred seventy-two".