18162920580 has 48 divisors (see below), whose sum is σ = 58121347200. Its totient is φ = 4151524608.

The previous prime is 18162920539. The next prime is 18162920599. The reversal of 18162920580 is 8502926181.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21622105 + ... + 21622944.

It is an arithmetic number, because the mean of its divisors is an integer number (1210861400).

Almost surely, 2^18162920580 is an apocalyptic number.

18162920580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18162920580 is an abundant number, since it is smaller than the sum of its proper divisors (39958426620).

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

18162920580 is a wasteful number, since it uses less digits than its factorization.

18162920580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43245068 (or 43245066 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The spelling of 18162920580 in words is "eighteen billion, one hundred sixty-two million, nine hundred twenty thousand, five hundred eighty".