22420243444 has 12 divisors (see below), whose sum is σ = 39521816964. Its totient is φ = 11128295744.

The previous prime is 22420243441. The next prime is 22420243457. The reversal of 22420243444 is 44434202422.

It can be written as a sum of positive squares in 2 ways, for example, as 4880419600 + 17539823844 = 69860^2 + 132438^2 .

It is a super-2 number, since 2×22420243444² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22420243441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20455879 + ... + 20456974.

It is an arithmetic number, because the mean of its divisors is an integer number (3293484747).

Almost surely, 2^22420243444 is an apocalyptic number.

It is an amenable number.

22420243444 is a deficient number, since it is larger than the sum of its proper divisors (17101573520).

22420243444 is a wasteful number, since it uses less digits than its factorization.

22420243444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40912994 (or 40912992 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 31.

Adding to 22420243444 its reverse (44434202422), we get a palindrome (66854445866).

The spelling of 22420243444 in words is "twenty-two billion, four hundred twenty million, two hundred forty-three thousand, four hundred forty-four".