18720850760 has 32 divisors (see below), whose sum is σ = 42305873400. Its totient is φ = 7455636480.

The previous prime is 18720850739. The next prime is 18720850783. The reversal of 18720850760 is 6705802781.

It can be written as a sum of positive squares in 4 ways, for example, as 15138349444 + 3582501316 = 123038^2 + 59854^2 .

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, 1012721 + ... + 1031040.

Almost surely, 2^18720850760 is an apocalyptic number.

18720850760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18720850760 is an abundant number, since it is smaller than the sum of its proper divisors (23585022640).

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

18720850760 is a wasteful number, since it uses less digits than its factorization.

18720850760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044001 (or 2043997 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 44.

The spelling of 18720850760 in words is "eighteen billion, seven hundred twenty million, eight hundred fifty thousand, seven hundred sixty".