22172438730 has 64 divisors (see below), whose sum is σ = 58639996800. Its totient is φ = 5330900736.

The previous prime is 22172438719. The next prime is 22172438731. The reversal of 22172438730 is 3783427122.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (22172438731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 644305 + ... + 677844.

It is an arithmetic number, because the mean of its divisors is an integer number (916249950).

Almost surely, 2^22172438730 is an apocalyptic number.

22172438730 is an abundant number, since it is smaller than the sum of its proper divisors (36467558070).

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

22172438730 is a wasteful number, since it uses less digits than its factorization.

22172438730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322215.

The product of its (nonzero) digits is 112896, while the sum is 39.

The spelling of 22172438730 in words is "twenty-two billion, one hundred seventy-two million, four hundred thirty-eight thousand, seven hundred thirty".