18974156 has 12 divisors (see below), whose sum is σ = 33251400. Its totient is φ = 9473760.

The previous prime is 18974147. The next prime is 18974173. The reversal of 18974156 is 65147981.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320 + ... + 6168.

It is an arithmetic number, because the mean of its divisors is an integer number (2770950).

Almost surely, 2^18974156 is an apocalyptic number.

It is an amenable number.

18974156 is a deficient number, since it is larger than the sum of its proper divisors (14277244).

18974156 is a wasteful number, since it uses less digits than its factorization.

18974156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6664 (or 6662 counting only the distinct ones).

The product of its digits is 60480, while the sum is 41.

The square root of 18974156 is about 4355.9334246519. The cubic root of 18974156 is about 266.7191237081.

The spelling of 18974156 in words is "eighteen million, nine hundred seventy-four thousand, one hundred fifty-six".