22124203400 has 96 divisors (see below), whose sum is σ = 56441153160. Its totient is φ = 8014755840.

The previous prime is 22124203379. The next prime is 22124203403. The reversal of 22124203400 is 430242122.

It can be written as a sum of positive squares in 12 ways, for example, as 2657814916 + 19466388484 = 51554^2 + 139522^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (22124203403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57524 + ... + 218076.

Almost surely, 2^22124203400 is an apocalyptic number.

22124203400 is a gapful number since it is divisible by the number (20) 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 22124203400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28220576580).

22124203400 is an abundant number, since it is smaller than the sum of its proper divisors (34316949760).

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

22124203400 is a wasteful number, since it uses less digits than its factorization.

22124203400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160635 (or 160626 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 22124203400 its reverse (430242122), we get a palindrome (22554445522).

The spelling of 22124203400 in words is "twenty-two billion, one hundred twenty-four million, two hundred three thousand, four hundred".