18687202172 has 12 divisors (see below), whose sum is σ = 32707849440. Its totient is φ = 9342102336.

The previous prime is 18687202153. The next prime is 18687202181. The reversal of 18687202172 is 27120278681.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346397 + ... + 396692.

It is an arithmetic number, because the mean of its divisors is an integer number (2725654120).

Almost surely, 2^18687202172 is an apocalyptic number.

It is an amenable number.

18687202172 is a deficient number, since it is larger than the sum of its proper divisors (14020647268).

18687202172 is a wasteful number, since it uses less digits than its factorization.

18687202172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749380 (or 749378 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 44.

The spelling of 18687202172 in words is "eighteen billion, six hundred eighty-seven million, two hundred two thousand, one hundred seventy-two".