18500553672 has 32 divisors (see below), whose sum is σ = 46277373600. Its totient is φ = 6163385984.

The previous prime is 18500553667. The next prime is 18500553691. The reversal of 18500553672 is 27635500581.

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, 172797 + ... + 258572.

It is an arithmetic number, because the mean of its divisors is an integer number (1446167925).

Almost surely, 2^18500553672 is an apocalyptic number.

18500553672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18500553672 is an abundant number, since it is smaller than the sum of its proper divisors (27776819928).

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

18500553672 is a wasteful number, since it uses less digits than its factorization.

18500553672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433165 (or 433161 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 42.

The spelling of 18500553672 in words is "eighteen billion, five hundred million, five hundred fifty-three thousand, six hundred seventy-two".