18224518712 has 16 divisors (see below), whose sum is σ = 34198350000. Its totient is φ = 9104958720.

The previous prime is 18224518643. The next prime is 18224518723. The reversal of 18224518712 is 21781542281.

It is a self number, because there is not a number n which added to its sum of digits gives 18224518712.

It is a congruent number.

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, 901964 + ... + 921947.

It is an arithmetic number, because the mean of its divisors is an integer number (2137396875).

Almost surely, 2^18224518712 is an apocalyptic number.

It is an amenable number.

18224518712 is a deficient number, since it is larger than the sum of its proper divisors (15973831288).

18224518712 is a wasteful number, since it uses less digits than its factorization.

18224518712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825166 (or 1825162 counting only the distinct ones).

The product of its digits is 71680, while the sum is 41.

The spelling of 18224518712 in words is "eighteen billion, two hundred twenty-four million, five hundred eighteen thousand, seven hundred twelve".