22022220440 has 64 divisors (see below), whose sum is σ = 54399008160. Its totient is φ = 7957048320.

The previous prime is 22022220421. The next prime is 22022220511. The reversal of 22022220440 is 4402222022.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90317 + ... + 228476.

Almost surely, 2^22022220440 is an apocalyptic number.

22022220440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22022220440 is an abundant number, since it is smaller than the sum of its proper divisors (32376787720).

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

22022220440 is a wasteful number, since it uses less digits than its factorization.

22022220440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318972 (or 318968 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 22022220440 its reverse (4402222022), we get a palindrome (26424442462).

The spelling of 22022220440 in words is "twenty-two billion, twenty-two million, two hundred twenty thousand, four hundred forty".