18934986 has 32 divisors (see below), whose sum is σ = 44679168. Its totient is φ = 5235120.

The previous prime is 18934969. The next prime is 18934987. The reversal of 18934986 is 68943981.

It is not an unprimeable number, because it can be changed into a prime (18934987) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5970 + ... + 8573.

It is an arithmetic number, because the mean of its divisors is an integer number (1396224).

Almost surely, 2^18934986 is an apocalyptic number.

18934986 is an abundant number, since it is smaller than the sum of its proper divisors (25744182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18934986 is a wasteful number, since it uses less digits than its factorization.

18934986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14586.

The product of its digits is 373248, while the sum is 48.

The square root of 18934986 is about 4351.4349357425. The cubic root of 18934986 is about 266.5354601065.

The spelling of 18934986 in words is "eighteen million, nine hundred thirty-four thousand, nine hundred eighty-six".