18686670020 has 12 divisors (see below), whose sum is σ = 39242007084. Its totient is φ = 7474668000.

The previous prime is 18686670007. The next prime is 18686670047. The reversal of 18686670020 is 2007668681.

It can be written as a sum of positive squares in 2 ways, for example, as 12304577476 + 6382092544 = 110926^2 + 79888^2 .

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 3 ways as a sum of consecutive naturals, for example, 467166731 + ... + 467166770.

It is an arithmetic number, because the mean of its divisors is an integer number (3270167257).

Almost surely, 2^18686670020 is an apocalyptic number.

18686670020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18686670020 is an abundant number, since it is smaller than the sum of its proper divisors (20555337064).

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

18686670020 is a wasteful number, since it uses less digits than its factorization.

18686670020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934333510 (or 934333508 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 18686670020 in words is "eighteen billion, six hundred eighty-six million, six hundred seventy thousand, twenty".