18222704136 has 384 divisors, whose sum is σ = 63402393600. Its totient is φ = 4774775040.

The previous prime is 18222704099. The next prime is 18222704147. The reversal of 18222704136 is 63140722281.

It is a happy number.

18222704136 is a `hidden beast` number, since 18 + 2 + 227 + 0 + 413 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18222704136.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 42279841 + ... + 42280271.

It is an arithmetic number, because the mean of its divisors is an integer number (165110400).

Almost surely, 2^18222704136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18222704136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31701196800).

18222704136 is an abundant number, since it is smaller than the sum of its proper divisors (45179689464).

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

18222704136 is a wasteful number, since it uses less digits than its factorization.

18222704136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 18222704136 in words is "eighteen billion, two hundred twenty-two million, seven hundred four thousand, one hundred thirty-six".