18120799660 has 12 divisors (see below), whose sum is σ = 38053679328. Its totient is φ = 7248319856.

The previous prime is 18120799657. The next prime is 18120799673. The reversal of 18120799660 is 6699702181.

It is a super-2 number, since 2×18120799660² (a number of 21 digits) contains 22 as substring.

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, 453019972 + ... + 453020011.

It is an arithmetic number, because the mean of its divisors is an integer number (3171139944).

Almost surely, 2^18120799660 is an apocalyptic number.

18120799660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18120799660 is an abundant number, since it is smaller than the sum of its proper divisors (19932879668).

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

18120799660 is a wasteful number, since it uses less digits than its factorization.

18120799660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906039992 (or 906039990 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 49.

The spelling of 18120799660 in words is "eighteen billion, one hundred twenty million, seven hundred ninety-nine thousand, six hundred sixty".