18202418660 has 24 divisors (see below), whose sum is σ = 38236281720. Its totient is φ = 7278833664.

The previous prime is 18202418659. The next prime is 18202418693. The reversal of 18202418660 is 6681420281.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2288091556 + 15914327104 = 47834^2 + 126152^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62495 + ... + 200774.

It is an arithmetic number, because the mean of its divisors is an integer number (1593178405).

Almost surely, 2^18202418660 is an apocalyptic number.

18202418660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18202418660 is an abundant number, since it is smaller than the sum of its proper divisors (20033863060).

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

18202418660 is a wasteful number, since it uses less digits than its factorization.

18202418660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266735 (or 266733 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The spelling of 18202418660 in words is "eighteen billion, two hundred two million, four hundred eighteen thousand, six hundred sixty".