18072220580 has 48 divisors (see below), whose sum is σ = 39520535040. Its totient is φ = 6933360000.

The previous prime is 18072220559. The next prime is 18072220589. The reversal of 18072220580 is 8502227081.

It is a self number, because there is not a number n which added to its sum of digits gives 18072220580.

It is not an unprimeable number, because it can be changed into a prime (18072220589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15596 + ... + 190755.

It is an arithmetic number, because the mean of its divisors is an integer number (823344480).

Almost surely, 2^18072220580 is an apocalyptic number.

18072220580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18072220580 is an abundant number, since it is smaller than the sum of its proper divisors (21448314460).

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

18072220580 is a wasteful number, since it uses less digits than its factorization.

18072220580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206540 (or 206538 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The spelling of 18072220580 in words is "eighteen billion, seventy-two million, two hundred twenty thousand, five hundred eighty".