18766990 has 16 divisors (see below), whose sum is σ = 36851760. Its totient is φ = 6824320.

The previous prime is 18766987. The next prime is 18767009. The reversal of 18766990 is 9966781.

It is a self number, because there is not a number n which added to its sum of digits gives 18766990.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85195 + ... + 85414.

It is an arithmetic number, because the mean of its divisors is an integer number (2303235).

Almost surely, 2^18766990 is an apocalyptic number.

18766990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18766990 is a deficient number, since it is larger than the sum of its proper divisors (18084770).

18766990 is a wasteful number, since it uses less digits than its factorization.

18766990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170627.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 18766990 is about 4332.0884109168. The cubic root of 18766990 is about 265.7448606003.

The spelling of 18766990 in words is "eighteen million, seven hundred sixty-six thousand, nine hundred ninety".