18909828980 has 48 divisors (see below), whose sum is σ = 45397019136. Its totient is φ = 6481451520.

The previous prime is 18909828961. The next prime is 18909828997. The reversal of 18909828980 is 8982890981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 503660 + ... + 539900.

It is an arithmetic number, because the mean of its divisors is an integer number (945771232).

Almost surely, 2^18909828980 is an apocalyptic number.

18909828980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18909828980 is an abundant number, since it is smaller than the sum of its proper divisors (26487190156).

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

18909828980 is a wasteful number, since it uses less digits than its factorization.

18909828980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39984 (or 39982 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 62.

The spelling of 18909828980 in words is "eighteen billion, nine hundred nine million, eight hundred twenty-eight thousand, nine hundred eighty".