18914216 has 32 divisors (see below), whose sum is σ = 37324800. Its totient is φ = 8973120.

The previous prime is 18914213. The next prime is 18914239. The reversal of 18914216 is 61241981.

It is not an unprimeable number, because it can be changed into a prime (18914213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12425 + ... + 13863.

It is an arithmetic number, because the mean of its divisors is an integer number (1166400).

Almost surely, 2^18914216 is an apocalyptic number.

It is an amenable number.

18914216 is a deficient number, since it is larger than the sum of its proper divisors (18410584).

18914216 is a wasteful number, since it uses less digits than its factorization.

18914216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529 (or 1525 counting only the distinct ones).

The product of its digits is 3456, while the sum is 32.

The square root of 18914216 is about 4349.0477118560. The cubic root of 18914216 is about 266.4379691994.

The spelling of 18914216 in words is "eighteen million, nine hundred fourteen thousand, two hundred sixteen".