22388172445 has 4 divisors (see below), whose sum is σ = 26865806940. Its totient is φ = 17910537952.

The previous prime is 22388172437. The next prime is 22388172449. The reversal of 22388172445 is 54427188322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8564762116 + 13823410329 = 92546^2 + 117573^2 .

It is a cyclic number.

It is not a de Polignac number, because 22388172445 - 2³ = 22388172437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22388172395 and 22388172404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22388172449) 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, 2238817240 + ... + 2238817249.

It is an arithmetic number, because the mean of its divisors is an integer number (6716451735).

Almost surely, 2^22388172445 is an apocalyptic number.

It is an amenable number.

22388172445 is a deficient number, since it is larger than the sum of its proper divisors (4477634495).

22388172445 is an equidigital number, since it uses as much as digits as its factorization.

22388172445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4477634494.

The product of its digits is 860160, while the sum is 46.

The spelling of 22388172445 in words is "twenty-two billion, three hundred eighty-eight million, one hundred seventy-two thousand, four hundred forty-five".