18872816 has 10 divisors (see below), whose sum is σ = 36566112. Its totient is φ = 9436400.

The previous prime is 18872809. The next prime is 18872827. The reversal of 18872816 is 61827881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 589760 + ... + 589791.

Almost surely, 2^18872816 is an apocalyptic number.

18872816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18872816 is a deficient number, since it is larger than the sum of its proper divisors (17693296).

18872816 is a wasteful number, since it uses less digits than its factorization.

18872816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179559 (or 1179553 counting only the distinct ones).

The product of its digits is 43008, while the sum is 41.

The square root of 18872816 is about 4344.2854418189. The cubic root of 18872816 is about 266.2434314028.

The spelling of 18872816 in words is "eighteen million, eight hundred seventy-two thousand, eight hundred sixteen".