22143400400 has 120 divisors (see below), whose sum is σ = 59386017504. Its totient is φ = 7864819200.

The previous prime is 22143400381. The next prime is 22143400423. The reversal of 22143400400 is 400434122.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130682 + ... + 247718.

Almost surely, 2^22143400400 is an apocalyptic number.

22143400400 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 22143400400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29693008752).

22143400400 is an abundant number, since it is smaller than the sum of its proper divisors (37242617104).

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

22143400400 is a wasteful number, since it uses less digits than its factorization.

22143400400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117109 (or 117098 counting only the distinct ones).

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

Adding to 22143400400 its reverse (400434122), we get a palindrome (22543834522).

The spelling of 22143400400 in words is "twenty-two billion, one hundred forty-three million, four hundred thousand, four hundred".