18264690 has 40 divisors (see below), whose sum is σ = 49113900. Its totient is φ = 4870368.

The previous prime is 18264683. The next prime is 18264707. The reversal of 18264690 is 9646281.

18264690 is a `hidden beast` number, since 1 + 8 + 2 + 646 + 9 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 16916769 + 1347921 = 4113^2 + 1161^2 .

It is a super-2 number, since 2×18264690² = 667197801592200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10465 + ... + 12084.

Almost surely, 2^18264690 is an apocalyptic number.

18264690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18264690 is an abundant number, since it is smaller than the sum of its proper divisors (30849210).

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

18264690 is a wasteful number, since it uses less digits than its factorization.

18264690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22568 (or 22559 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 18264690 is about 4273.7208612636. The cubic root of 18264690 is about 263.3524937544.

The spelling of 18264690 in words is "eighteen million, two hundred sixty-four thousand, six hundred ninety".