18572819208 has 16 divisors (see below), whose sum is σ = 46432048080. Its totient is φ = 6190939728.

The previous prime is 18572819191. The next prime is 18572819227. The reversal of 18572819208 is 80291827581.

It is a super-2 number, since 2×18572819208² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386933710 + ... + 386933757.

It is an arithmetic number, because the mean of its divisors is an integer number (2902003005).

Almost surely, 2^18572819208 is an apocalyptic number.

It is an amenable number.

18572819208 is an abundant number, since it is smaller than the sum of its proper divisors (27859228872).

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

18572819208 is a wasteful number, since it uses less digits than its factorization.

18572819208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773867476 (or 773867472 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 51.

The spelling of 18572819208 in words is "eighteen billion, five hundred seventy-two million, eight hundred nineteen thousand, two hundred eight".