22912905 has 16 divisors (see below), whose sum is σ = 36720000. Its totient is φ = 12200448.

The previous prime is 22912867. The next prime is 22912909. The reversal of 22912905 is 50921922.

It is not a de Polignac number, because 22912905 - 2⁷ = 22912777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22912909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17721 + ... + 18969.

It is an arithmetic number, because the mean of its divisors is an integer number (2295000).

Almost surely, 2^22912905 is an apocalyptic number.

It is an amenable number.

22912905 is a deficient number, since it is larger than the sum of its proper divisors (13807095).

22912905 is a wasteful number, since it uses less digits than its factorization.

22912905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 22912905 is about 4786.7426293880. The cubic root of 22912905 is about 284.0272778468.

The spelling of 22912905 in words is "twenty-two million, nine hundred twelve thousand, nine hundred five".