18487978982 has 16 divisors (see below), whose sum is σ = 30255703632. Its totient is φ = 8402891520.

The previous prime is 18487978969. The next prime is 18487978991. The reversal of 18487978982 is 28987978481.

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 7 ways as a sum of consecutive naturals, for example, 281678 + ... + 341054.

It is an arithmetic number, because the mean of its divisors is an integer number (1890981477).

Almost surely, 2^18487978982 is an apocalyptic number.

18487978982 is a deficient number, since it is larger than the sum of its proper divisors (11767724650).

18487978982 is a wasteful number, since it uses less digits than its factorization.

18487978982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73543.

The product of its digits is 130056192, while the sum is 71.

The spelling of 18487978982 in words is "eighteen billion, four hundred eighty-seven million, nine hundred seventy-eight thousand, nine hundred eighty-two".