18162213472 has 24 divisors (see below), whose sum is σ = 38507386176. Its totient is φ = 8382559872.

The previous prime is 18162213457. The next prime is 18162213473. The reversal of 18162213472 is 27431226181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18162213473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21829168 + ... + 21829999.

It is an arithmetic number, because the mean of its divisors is an integer number (1604474424).

Almost surely, 2^18162213472 is an apocalyptic number.

It is an amenable number.

18162213472 is an abundant number, since it is smaller than the sum of its proper divisors (20345172704).

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

18162213472 is a wasteful number, since it uses less digits than its factorization.

18162213472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43659190 (or 43659182 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The spelling of 18162213472 in words is "eighteen billion, one hundred sixty-two million, two hundred thirteen thousand, four hundred seventy-two".