18802864 has 40 divisors (see below), whose sum is σ = 37997568. Its totient is φ = 9003840.

The previous prime is 18802853. The next prime is 18802871. The reversal of 18802864 is 46820881.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82719 + ... + 82945.

Almost surely, 2^18802864 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 18802864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18998784).

18802864 is an abundant number, since it is smaller than the sum of its proper divisors (19194704).

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

18802864 is a wasteful number, since it uses less digits than its factorization.

18802864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 37.

The square root of 18802864 is about 4336.2269313310. The cubic root of 18802864 is about 265.9140808304.

The spelling of 18802864 in words is "eighteen million, eight hundred two thousand, eight hundred sixty-four".