18466990 has 16 divisors (see below), whose sum is σ = 33291648. Its totient is φ = 7375456.

The previous prime is 18466969. The next prime is 18467003. The reversal of 18466990 is 9966481.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9219 + ... + 11041.

It is an arithmetic number, because the mean of its divisors is an integer number (2080728).

Almost surely, 2^18466990 is an apocalyptic number.

18466990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18466990 is a deficient number, since it is larger than the sum of its proper divisors (14824658).

18466990 is a wasteful number, since it uses less digits than its factorization.

18466990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 18466990 is about 4297.3235856752. The cubic root of 18466990 is about 264.3212247669.

It can be divided in two parts, 1846 and 6990, that added together give a square (8836 = 94²).

The spelling of 18466990 in words is "eighteen million, four hundred sixty-six thousand, nine hundred ninety".