18313928 has 16 divisors (see below), whose sum is σ = 34445580. Its totient is φ = 9128448.

The previous prime is 18313907. The next prime is 18313949. The reversal of 18313928 is 82931381.

It is an interprime number because it is at equal distance from previous prime (18313907) and next prime (18313949).

It can be written as a sum of positive squares in 2 ways, for example, as 16176484 + 2137444 = 4022^2 + 1462^2 .

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, 701 + ... + 6092.

Almost surely, 2^18313928 is an apocalyptic number.

It is an amenable number.

18313928 is a deficient number, since it is larger than the sum of its proper divisors (16131652).

18313928 is a wasteful number, since it uses less digits than its factorization.

18313928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7136 (or 7132 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 18313928 is about 4279.4775382049. The cubic root of 18313928 is about 263.5889302044.

The spelling of 18313928 in words is "eighteen million, three hundred thirteen thousand, nine hundred twenty-eight".