18487060820 has 12 divisors (see below), whose sum is σ = 38822827764. Its totient is φ = 7394824320.

The previous prime is 18487060811. The next prime is 18487060877. The reversal of 18487060820 is 2806078481.

It can be written as a sum of positive squares in 2 ways, for example, as 5101959184 + 13385101636 = 71428^2 + 115694^2 .

It is a congruent number.

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, 462176501 + ... + 462176540.

It is an arithmetic number, because the mean of its divisors is an integer number (3235235647).

Almost surely, 2^18487060820 is an apocalyptic number.

18487060820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18487060820 is an abundant number, since it is smaller than the sum of its proper divisors (20335766944).

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

18487060820 is a wasteful number, since it uses less digits than its factorization.

18487060820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924353050 (or 924353048 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 44.

The spelling of 18487060820 in words is "eighteen billion, four hundred eighty-seven million, sixty thousand, eight hundred twenty".