18866396 has 48 divisors (see below), whose sum is σ = 36705312. Its totient is φ = 8448000.

The previous prime is 18866389. The next prime is 18866399. The reversal of 18866396 is 69366881.

It is a self number, because there is not a number n which added to its sum of digits gives 18866396.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18866399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186746 + ... + 186846.

It is an arithmetic number, because the mean of its divisors is an integer number (764694).

Almost surely, 2^18866396 is an apocalyptic number.

It is an amenable number.

18866396 is a deficient number, since it is larger than the sum of its proper divisors (17838916).

18866396 is a wasteful number, since it uses less digits than its factorization.

18866396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 228 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 18866396 is about 4343.5464772464. The cubic root of 18866396 is about 266.2132384755.

The spelling of 18866396 in words is "eighteen million, eight hundred sixty-six thousand, three hundred ninety-six".