18839916 has 36 divisors (see below), whose sum is σ = 47775000. Its totient is φ = 6259968.

The previous prime is 18839867. The next prime is 18839917. The reversal of 18839916 is 61993881.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (18839917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14460 + ... + 15708.

Almost surely, 2^18839916 is an apocalyptic number.

It is an amenable number.

18839916 is an abundant number, since it is smaller than the sum of its proper divisors (28935084).

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

18839916 is a wasteful number, since it uses less digits than its factorization.

18839916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678 (or 1673 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 18839916 is about 4340.4972065421. The cubic root of 18839916 is about 266.0886319677.

It can be divided in two parts, 188 and 39916, that added together give a palindrome (40104).

The spelling of 18839916 in words is "eighteen million, eight hundred thirty-nine thousand, nine hundred sixteen".