18712982 has 4 divisors (see below), whose sum is σ = 28069476. Its totient is φ = 9356490.

The previous prime is 18712943. The next prime is 18713027. The reversal of 18712982 is 28921781.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4678244 + ... + 4678247.

It is an arithmetic number, because the mean of its divisors is an integer number (7017369).

Almost surely, 2^18712982 is an apocalyptic number.

18712982 is a deficient number, since it is larger than the sum of its proper divisors (9356494).

18712982 is an equidigital number, since it uses as much as digits as its factorization.

18712982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9356493.

The product of its digits is 16128, while the sum is 38.

The square root of 18712982 is about 4325.8504366194. The cubic root of 18712982 is about 265.4896938011.

The spelling of 18712982 in words is "eighteen million, seven hundred twelve thousand, nine hundred eighty-two".