18807939930 has 64 divisors (see below), whose sum is σ = 48679626240. Its totient is φ = 4623138816.

The previous prime is 18807939929. The next prime is 18807939959. The reversal of 18807939930 is 3993970881.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 246874 + ... + 313946.

It is an arithmetic number, because the mean of its divisors is an integer number (760619160).

Almost surely, 2^18807939930 is an apocalyptic number.

18807939930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18807939930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24339813120).

18807939930 is an abundant number, since it is smaller than the sum of its proper divisors (29871686310).

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

18807939930 is a wasteful number, since it uses less digits than its factorization.

18807939930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67815.

The product of its (nonzero) digits is 2939328, while the sum is 57.

The spelling of 18807939930 in words is "eighteen billion, eight hundred seven million, nine hundred thirty-nine thousand, nine hundred thirty".