22002222400 has 42 divisors (see below), whose sum is σ = 54139222430. Its totient is φ = 8800888320.

The previous prime is 22002222397. The next prime is 22002222421. The reversal of 22002222400 is 422220022.

It can be written as a sum of positive squares in 3 ways, for example, as 2699010304 + 19303212096 = 51952^2 + 138936^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 6874095 + ... + 6877294.

Almost surely, 2^22002222400 is an apocalyptic number.

22002222400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22002222400 is an abundant number, since it is smaller than the sum of its proper divisors (32137000030).

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

22002222400 is a wasteful number, since it uses less digits than its factorization.

22002222400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13751411 (or 13751396 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 22002222400 its reverse (422220022), we get a palindrome (22424442422).

The spelling of 22002222400 in words is "twenty-two billion, two million, two hundred twenty-two thousand, four hundred".