18520000050 has 24 divisors (see below), whose sum is σ = 45929600496. Its totient is φ = 4938666640.

The previous prime is 18520000043. The next prime is 18520000061. The reversal of 18520000050 is 5000002581.

It is a junction number, because it is equal to n+sod(n) for n = 18519999981 and 18520000026.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61733184 + ... + 61733483.

It is an arithmetic number, because the mean of its divisors is an integer number (1913733354).

Almost surely, 2^18520000050 is an apocalyptic number.

18520000050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18520000050 is an abundant number, since it is smaller than the sum of its proper divisors (27409600446).

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

18520000050 is a wasteful number, since it uses less digits than its factorization.

18520000050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123466682 (or 123466677 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The spelling of 18520000050 in words is "eighteen billion, five hundred twenty million, fifty", and thus it is an aban number.