18310664 has 8 divisors (see below), whose sum is σ = 34332510. Its totient is φ = 9155328.

The previous prime is 18310651. The next prime is 18310673. The reversal of 18310664 is 46601381.

It can be written as a sum of positive squares in only one way, i.e., 16728100 + 1582564 = 4090^2 + 1258^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×18310664² = 670560832241792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1144409 + ... + 1144424.

Almost surely, 2^18310664 is an apocalyptic number.

It is an amenable number.

18310664 is a deficient number, since it is larger than the sum of its proper divisors (16021846).

18310664 is a wasteful number, since it uses less digits than its factorization.

18310664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288839 (or 2288835 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 18310664 is about 4279.0961662482. The cubic root of 18310664 is about 263.5732698942.

The spelling of 18310664 in words is "eighteen million, three hundred ten thousand, six hundred sixty-four".