22730390232 has 128 divisors (see below), whose sum is σ = 65435040000. Its totient is φ = 6507440640.

The previous prime is 22730390231. The next prime is 22730390273. The reversal of 22730390232 is 23209303722.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 22730390193 and 22730390202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22730390231) 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, 1864894 + ... + 1877042.

It is an arithmetic number, because the mean of its divisors is an integer number (511211250).

Almost surely, 2^22730390232 is an apocalyptic number.

22730390232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22730390232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32717520000).

22730390232 is an abundant number, since it is smaller than the sum of its proper divisors (42704649768).

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

22730390232 is a wasteful number, since it uses less digits than its factorization.

22730390232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12561 (or 12557 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 33.

Adding to 22730390232 its reverse (23209303722), we get a palindrome (45939693954).

The spelling of 22730390232 in words is "twenty-two billion, seven hundred thirty million, three hundred ninety thousand, two hundred thirty-two".