22919906 has 4 divisors (see below), whose sum is σ = 34379862. Its totient is φ = 11459952.

The previous prime is 22919873. The next prime is 22919917. The reversal of 22919906 is 60991922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60991922 = 2 ⋅30495961.

It can be written as a sum of positive squares in only one way, i.e., 21242881 + 1677025 = 4609^2 + 1295^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22919906.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5729975 + ... + 5729978.

Almost surely, 2^22919906 is an apocalyptic number.

22919906 is a deficient number, since it is larger than the sum of its proper divisors (11459956).

22919906 is a wasteful number, since it uses less digits than its factorization.

22919906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11459955.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 22919906 is about 4787.4738641584. The cubic root of 22919906 is about 284.0562029217.

The spelling of 22919906 in words is "twenty-two million, nine hundred nineteen thousand, nine hundred six".