18323864 has 16 divisors (see below), whose sum is σ = 37000320. Its totient is φ = 8457120.

The previous prime is 18323861. The next prime is 18323867. The reversal of 18323864 is 46832381.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18323861) and next prime (18323867).

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18323861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87992 + ... + 88199.

It is an arithmetic number, because the mean of its divisors is an integer number (2312520).

Almost surely, 2^18323864 is an apocalyptic number.

It is an amenable number.

18323864 is an abundant number, since it is smaller than the sum of its proper divisors (18676456).

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

18323864 is a wasteful number, since it uses less digits than its factorization.

18323864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176210 (or 176206 counting only the distinct ones).

The product of its digits is 27648, while the sum is 35.

The square root of 18323864 is about 4280.6382701649. The cubic root of 18323864 is about 263.6365905810.

The spelling of 18323864 in words is "eighteen million, three hundred twenty-three thousand, eight hundred sixty-four".