18396864 has 126 divisors (see below), whose sum is σ = 56893460. Its totient is φ = 5667840.

The previous prime is 18396863. The next prime is 18396869. The reversal of 18396864 is 46869381.

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 (18396863) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 448684 + ... + 448724.

Almost surely, 2^18396864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18396864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28446730).

18396864 is an abundant number, since it is smaller than the sum of its proper divisors (38496596).

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

18396864 is a wasteful number, since it uses less digits than its factorization.

18396864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 65 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 18396864 is about 4289.1565604440. The cubic root of 18396864 is about 263.9862251766.

The spelling of 18396864 in words is "eighteen million, three hundred ninety-six thousand, eight hundred sixty-four".