18622368 has 36 divisors (see below), whose sum is σ = 52958178. Its totient is φ = 6207360.

The previous prime is 18622367. The next prime is 18622381. The reversal of 18622368 is 86322681.

It can be written as a sum of positive squares in only one way, i.e., 18558864 + 63504 = 4308^2 + 252^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (18622367) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32043 + ... + 32618.

Almost surely, 2^18622368 is an apocalyptic number.

18622368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18622368 is an abundant number, since it is smaller than the sum of its proper divisors (34335810).

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

18622368 is a wasteful number, since it uses less digits than its factorization.

18622368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64677 (or 64666 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 18622368 is about 4315.3641793017. The cubic root of 18622368 is about 265.0604727305.

The spelling of 18622368 in words is "eighteen million, six hundred twenty-two thousand, three hundred sixty-eight".