18906672 has 40 divisors (see below), whose sum is σ = 51415360. Its totient is φ = 5970240.

The previous prime is 18906659. The next prime is 18906697. The reversal of 18906672 is 27660981.

It is a super-2 number, since 2×18906672² = 714924492231168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18906672.

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, 9454 + ... + 11277.

It is an arithmetic number, because the mean of its divisors is an integer number (1285384).

Almost surely, 2^18906672 is an apocalyptic number.

18906672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18906672 is an abundant number, since it is smaller than the sum of its proper divisors (32508688).

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

18906672 is a wasteful number, since it uses less digits than its factorization.

18906672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20761 (or 20755 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 18906672 is about 4348.1803090488. The cubic root of 18906672 is about 266.4025412558.

The spelling of 18906672 in words is "eighteen million, nine hundred six thousand, six hundred seventy-two".