18313672 has 32 divisors (see below), whose sum is σ = 37167480. Its totient is φ = 8409600.

The previous prime is 18313661. The next prime is 18313693. The reversal of 18313672 is 27631381.

It can be written as a sum of positive squares in 4 ways, for example, as 18028516 + 285156 = 4246^2 + 534^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

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, 30172 + ... + 30772.

Almost surely, 2^18313672 is an apocalyptic number.

It is an amenable number.

18313672 is an abundant number, since it is smaller than the sum of its proper divisors (18853808).

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

18313672 is a wasteful number, since it uses less digits than its factorization.

18313672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913 (or 909 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 18313672 is about 4279.4476279071. The cubic root of 18313672 is about 263.5877020121.

The spelling of 18313672 in words is "eighteen million, three hundred thirteen thousand, six hundred seventy-two".