18799340220 has 72 divisors (see below), whose sum is σ = 59136705264. Its totient is φ = 5013156096.

The previous prime is 18799340177. The next prime is 18799340239. The reversal of 18799340220 is 2204399781.

18799340220 is a `hidden beast` number, since 1 + 87 + 9 + 9 + 340 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1929229 + ... + 1938948.

Almost surely, 2^18799340220 is an apocalyptic number.

18799340220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18799340220 is an abundant number, since it is smaller than the sum of its proper divisors (40337365044).

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

18799340220 is a wasteful number, since it uses less digits than its factorization.

18799340220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3868201 (or 3868187 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 18799340220 in words is "eighteen billion, seven hundred ninety-nine million, three hundred forty thousand, two hundred twenty".