18479972 has 12 divisors (see below), whose sum is σ = 36960000. Its totient is φ = 7919976.

The previous prime is 18479959. The next prime is 18480001. The reversal of 18479972 is 27997481.

18479972 is an admirable number.

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, 329972 + ... + 330027.

It is an arithmetic number, because the mean of its divisors is an integer number (3080000).

Almost surely, 2^18479972 is an apocalyptic number.

It is an amenable number.

18479972 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18479972 is a wasteful number, since it uses less digits than its factorization.

18479972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660010 (or 660008 counting only the distinct ones).

The product of its digits is 254016, while the sum is 47.

The square root of 18479972 is about 4298.8337953450. The cubic root of 18479972 is about 264.3831481299.

The spelling of 18479972 in words is "eighteen million, four hundred seventy-nine thousand, nine hundred seventy-two".