18737587020 has 24 divisors (see below), whose sum is σ = 52465243824. Its totient is φ = 4996689856.

The previous prime is 18737587013. The next prime is 18737587061. The reversal of 18737587020 is 2078573781.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156146499 + ... + 156146618.

It is an arithmetic number, because the mean of its divisors is an integer number (2186051826).

Almost surely, 2^18737587020 is an apocalyptic number.

18737587020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18737587020 is an abundant number, since it is smaller than the sum of its proper divisors (33727656804).

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

18737587020 is a wasteful number, since it uses less digits than its factorization.

18737587020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312293129 (or 312293127 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 48.

The spelling of 18737587020 in words is "eighteen billion, seven hundred thirty-seven million, five hundred eighty-seven thousand, twenty".