18918214 has 12 divisors (see below), whose sum is σ = 33010524. Its totient is φ = 8107764.

The previous prime is 18918199. The next prime is 18918233. The reversal of 18918214 is 41281981.

It is a self number, because there is not a number n which added to its sum of digits gives 18918214.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 96424 + ... + 96619.

It is an arithmetic number, because the mean of its divisors is an integer number (2750877).

Almost surely, 2^18918214 is an apocalyptic number.

18918214 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18918214 is a deficient number, since it is larger than the sum of its proper divisors (14092310).

18918214 is a wasteful number, since it uses less digits than its factorization.

18918214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193059 (or 193052 counting only the distinct ones).

The product of its digits is 4608, while the sum is 34.

The square root of 18918214 is about 4349.5073284224. The cubic root of 18918214 is about 266.4567406877.

The spelling of 18918214 in words is "eighteen million, nine hundred eighteen thousand, two hundred fourteen".