22129730 has 16 divisors (see below), whose sum is σ = 45524160. Its totient is φ = 7587312.

The previous prime is 22129721. The next prime is 22129739. The reversal of 22129730 is 3792122.

It is an interprime number because it is at equal distance from previous prime (22129721) and next prime (22129739).

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 22129730.

It is not an unprimeable number, because it can be changed into a prime (22129739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158000 + ... + 158139.

It is an arithmetic number, because the mean of its divisors is an integer number (2845260).

Almost surely, 2^22129730 is an apocalyptic number.

22129730 is an abundant number, since it is smaller than the sum of its proper divisors (23394430).

22129730 is a wasteful number, since it uses less digits than its factorization.

22129730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316153.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 22129730 is about 4704.2246970144. The cubic root of 22129730 is about 280.7536245494.

The spelling of 22129730 in words is "twenty-two million, one hundred twenty-nine thousand, seven hundred thirty".