22509138385 has 4 divisors (see below), whose sum is σ = 27010966068. Its totient is φ = 18007310704.

The previous prime is 22509138359. The next prime is 22509138451. The reversal of 22509138385 is 58383190522.

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 17295143121 + 5213995264 = 131511^2 + 72208^2 .

It is a cyclic number.

It is not a de Polignac number, because 22509138385 - 2⁷ = 22509138257 is a prime.

It is a super-2 number, since 2×22509138385² (a number of 22 digits) contains 22 as substring.

It is a Duffinian 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, 2250913834 + ... + 2250913843.

It is an arithmetic number, because the mean of its divisors is an integer number (6752741517).

Almost surely, 2^22509138385 is an apocalyptic number.

It is an amenable number.

22509138385 is a deficient number, since it is larger than the sum of its proper divisors (4501827683).

22509138385 is an equidigital number, since it uses as much as digits as its factorization.

22509138385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4501827682.

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 22509138385 in words is "twenty-two billion, five hundred nine million, one hundred thirty-eight thousand, three hundred eighty-five".