22439005381 has 16 divisors (see below), whose sum is σ = 25597527984. Its totient is φ = 19486162944.

The previous prime is 22439005297. The next prime is 22439005399. The reversal of 22439005381 is 18350093422.

It can be written as a sum of positive squares in 8 ways, for example, as 530565156 + 21908440225 = 23034^2 + 148015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22439005381 is a prime.

It is a super-2 number, since 2×22439005381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22439005381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22439005481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 526005 + ... + 567061.

It is an arithmetic number, because the mean of its divisors is an integer number (1599845499).

Almost surely, 2^22439005381 is an apocalyptic number.

It is an amenable number.

22439005381 is a deficient number, since it is larger than the sum of its proper divisors (3158522603).

22439005381 is a wasteful number, since it uses less digits than its factorization.

22439005381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43560.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 22439005381 in words is "twenty-two billion, four hundred thirty-nine million, five thousand, three hundred eighty-one".