18730972 has 24 divisors (see below), whose sum is σ = 36125936. Its totient is φ = 8443008.

The previous prime is 18730961. The next prime is 18730981. The reversal of 18730972 is 27903781.

It is a congruent number.

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, 1953 + ... + 6424.

Almost surely, 2^18730972 is an apocalyptic number.

It is an amenable number.

18730972 is a deficient number, since it is larger than the sum of its proper divisors (17394964).

18730972 is a wasteful number, since it uses less digits than its factorization.

18730972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8437 (or 8435 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 18730972 is about 4327.9292970195. The cubic root of 18730972 is about 265.5747440239.

The spelling of 18730972 in words is "eighteen million, seven hundred thirty thousand, nine hundred seventy-two".