18072388580 has 24 divisors (see below), whose sum is σ = 38020175928. Its totient is φ = 7215972608.

The previous prime is 18072388573. The next prime is 18072388597. The reversal of 18072388580 is 8588327081.

It can be written as a sum of positive squares in 4 ways, for example, as 517198564 + 17555190016 = 22742^2 + 132496^2 .

It is a super-2 number, since 2×18072388580² (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 7 ways as a sum of consecutive naturals, for example, 800009 + ... + 822288.

It is an arithmetic number, because the mean of its divisors is an integer number (1584173997).

Almost surely, 2^18072388580 is an apocalyptic number.

18072388580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18072388580 is an abundant number, since it is smaller than the sum of its proper divisors (19947787348).

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

18072388580 is a wasteful number, since it uses less digits than its factorization.

18072388580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622863 (or 1622861 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 50.

The spelling of 18072388580 in words is "eighteen billion, seventy-two million, three hundred eighty-eight thousand, five hundred eighty".