18450864 has 60 divisors (see below), whose sum is σ = 53047696. Its totient is φ = 5982336.

The previous prime is 18450851. The next prime is 18450871. The reversal of 18450864 is 46805481.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3597 + ... + 7059.

Almost surely, 2^18450864 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 18450864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26523848).

18450864 is an abundant number, since it is smaller than the sum of its proper divisors (34596832).

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

18450864 is a wasteful number, since it uses less digits than its factorization.

18450864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3514 (or 3505 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 18450864 is about 4295.4468917681. The cubic root of 18450864 is about 264.2442642845.

The spelling of 18450864 in words is "eighteen million, four hundred fifty thousand, eight hundred sixty-four".