22129235585 has 4 divisors (see below), whose sum is σ = 26555082708. Its totient is φ = 17703388464.

The previous prime is 22129235567. The next prime is 22129235599. The reversal of 22129235585 is 58553292122.

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 12985286209 + 9143949376 = 113953^2 + 95624^2 .

It is a cyclic number.

It is not a de Polignac number, because 22129235585 - 2⁶ = 22129235521 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2212923554 + ... + 2212923563.

It is an arithmetic number, because the mean of its divisors is an integer number (6638770677).

Almost surely, 2^22129235585 is an apocalyptic number.

It is an amenable number.

22129235585 is a deficient number, since it is larger than the sum of its proper divisors (4425847123).

22129235585 is an equidigital number, since it uses as much as digits as its factorization.

22129235585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425847122.

The product of its digits is 432000, while the sum is 44.

The spelling of 22129235585 in words is "twenty-two billion, one hundred twenty-nine million, two hundred thirty-five thousand, five hundred eighty-five".