18742984 has 16 divisors (see below), whose sum is σ = 37846620. Its totient is φ = 8650560.

The previous prime is 18742957. The next prime is 18743009. The reversal of 18742984 is 48924781.

It can be written as a sum of positive squares in 2 ways, for example, as 17892900 + 850084 = 4230^2 + 922^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18742984.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90007 + ... + 90214.

Almost surely, 2^18742984 is an apocalyptic number.

It is an amenable number.

18742984 is an abundant number, since it is smaller than the sum of its proper divisors (19103636).

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

18742984 is a wasteful number, since it uses less digits than its factorization.

18742984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180240 (or 180236 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 18742984 is about 4329.3168052246. The cubic root of 18742984 is about 265.6315021061.

The spelling of 18742984 in words is "eighteen million, seven hundred forty-two thousand, nine hundred eighty-four".