22400442021 has 32 divisors (see below), whose sum is σ = 30865881600. Its totient is φ = 14444052480.

The previous prime is 22400442017. The next prime is 22400442047. The reversal of 22400442021 is 12024400422.

It is not a de Polignac number, because 22400442021 - 2² = 22400442017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22400442011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3712435 + ... + 3718463.

It is an arithmetic number, because the mean of its divisors is an integer number (964558800).

Almost surely, 2^22400442021 is an apocalyptic number.

It is an amenable number.

22400442021 is a deficient number, since it is larger than the sum of its proper divisors (8465439579).

22400442021 is a wasteful number, since it uses less digits than its factorization.

22400442021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6429.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 22400442021 its reverse (12024400422), we get a palindrome (34424842443).

The spelling of 22400442021 in words is "twenty-two billion, four hundred million, four hundred forty-two thousand, twenty-one".