22002444444 has 12 divisors (see below), whose sum is σ = 51339037064. Its totient is φ = 7334148144.

The previous prime is 22002444439. The next prime is 22002444469. The reversal of 22002444444 is 44444420022.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×22002444444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 916768507 + ... + 916768530.

Almost surely, 2^22002444444 is an apocalyptic number.

It is an amenable number.

22002444444 is an abundant number, since it is smaller than the sum of its proper divisors (29336592620).

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

22002444444 is a wasteful number, since it uses less digits than its factorization.

22002444444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833537044 (or 1833537042 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 30.

Adding to 22002444444 its reverse (44444420022), we get a palindrome (66446864466).

The spelling of 22002444444 in words is "twenty-two billion, two million, four hundred forty-four thousand, four hundred forty-four".