22136730 has 144 divisors (see below), whose sum is σ = 69291936. Its totient is φ = 4475520.

The previous prime is 22136687. The next prime is 22136731. The reversal of 22136730 is 3763122.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22136730.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22136731) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 598272 + ... + 598308.

It is an arithmetic number, because the mean of its divisors is an integer number (481194).

Almost surely, 2^22136730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22136730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34645968).

22136730 is an abundant number, since it is smaller than the sum of its proper divisors (47155206).

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

22136730 is a wasteful number, since it uses less digits than its factorization.

22136730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 22136730 is about 4704.9686502675. The cubic root of 22136730 is about 280.7832237686.

Adding to 22136730 its reverse (3763122), we get a palindrome (25899852).

The spelling of 22136730 in words is "twenty-two million, one hundred thirty-six thousand, seven hundred thirty".