18214990 has 32 divisors (see below), whose sum is σ = 35069760. Its totient is φ = 6787584.

The previous prime is 18214981. The next prime is 18215003. The reversal of 18214990 is 9941281.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18039 + ... + 19021.

It is an arithmetic number, because the mean of its divisors is an integer number (1095930).

Almost surely, 2^18214990 is an apocalyptic number.

18214990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18214990 is a deficient number, since it is larger than the sum of its proper divisors (16854770).

18214990 is a wasteful number, since it uses less digits than its factorization.

18214990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 18214990 is about 4267.9022950391. The cubic root of 18214990 is about 263.1134075044.

The spelling of 18214990 in words is "eighteen million, two hundred fourteen thousand, nine hundred ninety".