22143400422 has 160 divisors (see below), whose sum is σ = 55497757824. Its totient is φ = 5821171200.

The previous prime is 22143400381. The next prime is 22143400423. The reversal of 22143400422 is 22400434122.

It is a junction number, because it is equal to n+sod(n) for n = 22143400392 and 22143400401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22143400423) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 32045097 + ... + 32045787.

Almost surely, 2^22143400422 is an apocalyptic number.

22143400422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 22143400422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27748878912).

22143400422 is an abundant number, since it is smaller than the sum of its proper divisors (33354357402).

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

22143400422 is a wasteful number, since it uses less digits than its factorization.

22143400422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 22143400422 its reverse (22400434122), we get a palindrome (44543834544).

The spelling of 22143400422 in words is "twenty-two billion, one hundred forty-three million, four hundred thousand, four hundred twenty-two".