18851799212 has 12 divisors (see below), whose sum is σ = 34425024816. Its totient is φ = 9016077840.

The previous prime is 18851799199. The next prime is 18851799233. The reversal of 18851799212 is 21299715881.

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, 102455339 + ... + 102455522.

It is an arithmetic number, because the mean of its divisors is an integer number (2868752068).

Almost surely, 2^18851799212 is an apocalyptic number.

It is an amenable number.

18851799212 is a deficient number, since it is larger than the sum of its proper divisors (15573225604).

18851799212 is a wasteful number, since it uses less digits than its factorization.

18851799212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204910888 (or 204910886 counting only the distinct ones).

The product of its digits is 725760, while the sum is 53.

The spelling of 18851799212 in words is "eighteen billion, eight hundred fifty-one million, seven hundred ninety-nine thousand, two hundred twelve".