18934923580 has 24 divisors (see below), whose sum is σ = 40688070192. Its totient is φ = 7397830272.

The previous prime is 18934923569. The next prime is 18934923589. The reversal of 18934923580 is 8532943981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18934923589) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11007817 + ... + 11009536.

It is an arithmetic number, because the mean of its divisors is an integer number (1695336258).

Almost surely, 2^18934923580 is an apocalyptic number.

18934923580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18934923580 is an abundant number, since it is smaller than the sum of its proper divisors (21753146612).

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

18934923580 is a wasteful number, since it uses less digits than its factorization.

18934923580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22017405 (or 22017403 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 18934923580 in words is "eighteen billion, nine hundred thirty-four million, nine hundred twenty-three thousand, five hundred eighty".