22385905 has 4 divisors (see below), whose sum is σ = 26863092. Its totient is φ = 17908720.

The previous prime is 22385897. The next prime is 22385939. The reversal of 22385905 is 50958322.

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 2663424 + 19722481 = 1632^2 + 4441^2 .

It is not a de Polignac number, because 22385905 - 2³ = 22385897 is a prime.

It is a super-2 number, since 2×22385905² = 1002257485338050, which contains 22 as substring.

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, 2238586 + ... + 2238595.

It is an arithmetic number, because the mean of its divisors is an integer number (6715773).

Almost surely, 2^22385905 is an apocalyptic number.

It is an amenable number.

22385905 is a deficient number, since it is larger than the sum of its proper divisors (4477187).

22385905 is an equidigital number, since it uses as much as digits as its factorization.

22385905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4477186.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 22385905 is about 4731.3745360096. The cubic root of 22385905 is about 281.8328108794.

The spelling of 22385905 in words is "twenty-two million, three hundred eighty-five thousand, nine hundred five".