22100022400 has 48 divisors (see below), whose sum is σ = 54593969490. Its totient is φ = 8840007680.

The previous prime is 22100022379. The next prime is 22100022449. The reversal of 22100022400 is 422000122.

It can be written as a sum of positive squares in 3 ways, for example, as 10794378816 + 11305643584 = 103896^2 + 106328^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3449929 + ... + 3456328.

Almost surely, 2^22100022400 is an apocalyptic number.

22100022400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22100022400 is an abundant number, since it is smaller than the sum of its proper divisors (32493947090).

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

22100022400 is an equidigital number, since it uses as much as digits as its factorization.

22100022400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6906281 (or 6906264 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 22100022400 its reverse (422000122), we get a palindrome (22522022522).

The spelling of 22100022400 in words is "twenty-two billion, one hundred million, twenty-two thousand, four hundred".