18214994 has 16 divisors (see below), whose sum is σ = 31347456. Its totient is φ = 7776000.

The previous prime is 18214981. The next prime is 18215003. The reversal of 18214994 is 49941281.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1394 + ... + 6194.

It is an arithmetic number, because the mean of its divisors is an integer number (1959216).

Almost surely, 2^18214994 is an apocalyptic number.

18214994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18214994 is a deficient number, since it is larger than the sum of its proper divisors (13132462).

18214994 is a wasteful number, since it uses less digits than its factorization.

18214994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5081.

The product of its digits is 20736, while the sum is 38.

The square root of 18214994 is about 4267.9027636534. The cubic root of 18214994 is about 263.1134267642.

The spelling of 18214994 in words is "eighteen million, two hundred fourteen thousand, nine hundred ninety-four".