18979672830 has 32 divisors (see below), whose sum is σ = 46323273600. Its totient is φ = 4975461792.

The previous prime is 18979672807. The next prime is 18979672867. The reversal of 18979672830 is 3827697981.

It is a Curzon number.

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, 5359720 + ... + 5363259.

It is an arithmetic number, because the mean of its divisors is an integer number (1447602300).

Almost surely, 2^18979672830 is an apocalyptic number.

18979672830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18979672830 is an abundant number, since it is smaller than the sum of its proper divisors (27343600770).

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

18979672830 is a wasteful number, since it uses less digits than its factorization.

18979672830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10723048.

The product of its (nonzero) digits is 9144576, while the sum is 60.

The spelling of 18979672830 in words is "eighteen billion, nine hundred seventy-nine million, six hundred seventy-two thousand, eight hundred thirty".