22909905 has 32 divisors (see below), whose sum is σ = 40965120. Its totient is φ = 12147840.

The previous prime is 22909891. The next prime is 22909949. The reversal of 22909905 is 50990922.

It is not a de Polignac number, because 22909905 - 2⁴ = 22909889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22909905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29725 + ... + 30485.

It is an arithmetic number, because the mean of its divisors is an integer number (1280160).

Almost surely, 2^22909905 is an apocalyptic number.

It is an amenable number.

22909905 is a deficient number, since it is larger than the sum of its proper divisors (18055215).

22909905 is a wasteful number, since it uses less digits than its factorization.

22909905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998 (or 992 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 22909905 is about 4786.4292536295. The cubic root of 22909905 is about 284.0148813534.

The spelling of 22909905 in words is "twenty-two million, nine hundred nine thousand, nine hundred five".