22500500421 has 32 divisors (see below), whose sum is σ = 36744173568. Its totient is φ = 11966011200.

The previous prime is 22500500387. The next prime is 22500500437. The reversal of 22500500421 is 12400500522.

It is a happy number.

It is not a de Polignac number, because 22500500421 - 2⁶ = 22500500357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22500500441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 611655 + ... + 647396.

It is an arithmetic number, because the mean of its divisors is an integer number (1148255424).

Almost surely, 2^22500500421 is an apocalyptic number.

22500500421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22500500421 is a deficient number, since it is larger than the sum of its proper divisors (14243673147).

22500500421 is a wasteful number, since it uses less digits than its factorization.

22500500421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259121.

The product of its (nonzero) digits is 800, while the sum is 21.

The spelling of 22500500421 in words is "twenty-two billion, five hundred million, five hundred thousand, four hundred twenty-one".