22139550738 has 54 divisors (see below), whose sum is σ = 50981429109. Its totient is φ = 6942374592.

The previous prime is 22139550731. The next prime is 22139550743. The reversal of 22139550738 is 83705593122.

22139550738 is a `hidden beast` number, since 2 + 2 + 139 + 5 + 507 + 3 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20262668409 + 1876882329 = 142347^2 + 43323^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=105213.

It is a junction number, because it is equal to n+sod(n) for n = 22139550693 and 22139550702.

It is not an unprimeable number, because it can be changed into a prime (22139550731) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 10730695 + ... + 10732757.

Almost surely, 2^22139550738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22139550738

22139550738 is an abundant number, since it is smaller than the sum of its proper divisors (28841878371).

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

22139550738 is an equidigital number, since it uses as much as digits as its factorization.

22139550738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4168 (or 2085 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 22139550738 in words is "twenty-two billion, one hundred thirty-nine million, five hundred fifty thousand, seven hundred thirty-eight".