22181368 has 64 divisors (see below), whose sum is σ = 48107520. Its totient is φ = 9494400.

The previous prime is 22181363. The next prime is 22181377. The reversal of 22181368 is 86318122.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22181363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128130 + ... + 128302.

It is an arithmetic number, because the mean of its divisors is an integer number (751680).

Almost surely, 2^22181368 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 22181368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24053760).

22181368 is an abundant number, since it is smaller than the sum of its proper divisors (25926152).

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

22181368 is a wasteful number, since it uses less digits than its factorization.

22181368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268 (or 264 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 22181368 is about 4709.7099698389. The cubic root of 22181368 is about 280.9718271506.

The spelling of 22181368 in words is "twenty-two million, one hundred eighty-one thousand, three hundred sixty-eight".