22130730 has 24 divisors (see below), whose sum is σ = 57540132. Its totient is φ = 5901504.

The previous prime is 22130671. The next prime is 22130737. The reversal of 22130730 is 3703122.

It can be written as a sum of positive squares in 2 ways, for example, as 22099401 + 31329 = 4701^2 + 177^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22130737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122859 + ... + 123038.

Almost surely, 2^22130730 is an apocalyptic number.

22130730 is an abundant number, since it is smaller than the sum of its proper divisors (35409402).

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

22130730 is a wasteful number, since it uses less digits than its factorization.

22130730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245910 (or 245907 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 22130730 is about 4704.3309832536. The cubic root of 22130730 is about 280.7578533914.

Adding to 22130730 its reverse (3703122), we get a palindrome (25833852).

The spelling of 22130730 in words is "twenty-two million, one hundred thirty thousand, seven hundred thirty".