18677216 has 24 divisors (see below), whose sum is σ = 36868104. Its totient is φ = 9313920.

The previous prime is 18677213. The next prime is 18677231. The reversal of 18677216 is 61277681.

It is a self number, because there is not a number n which added to its sum of digits gives 18677216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18677213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20711 + ... + 21593.

It is an arithmetic number, because the mean of its divisors is an integer number (1536171).

Almost surely, 2^18677216 is an apocalyptic number.

18677216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18677216 is a deficient number, since it is larger than the sum of its proper divisors (18190888).

18677216 is an equidigital number, since it uses as much as digits as its factorization.

18677216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554 (or 1546 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 18677216 is about 4321.7144746038. The cubic root of 18677216 is about 265.3204430214.

The spelling of 18677216 in words is "eighteen million, six hundred seventy-seven thousand, two hundred sixteen".