18987625982 has 32 divisors (see below), whose sum is σ = 31497403392. Its totient is φ = 8530389504.

The previous prime is 18987625931. The next prime is 18987626023. The reversal of 18987625982 is 28952678981.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120758 + ... + 229254.

It is an arithmetic number, because the mean of its divisors is an integer number (984293856).

Almost surely, 2^18987625982 is an apocalyptic number.

18987625982 is a deficient number, since it is larger than the sum of its proper divisors (12509777410).

18987625982 is a wasteful number, since it uses less digits than its factorization.

18987625982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108692.

The product of its digits is 34836480, while the sum is 65.

The spelling of 18987625982 in words is "eighteen billion, nine hundred eighty-seven million, six hundred twenty-five thousand, nine hundred eighty-two".