22358909 has 4 divisors (see below), whose sum is σ = 22472604. Its totient is φ = 22245216.

The previous prime is 22358881. The next prime is 22358923. The reversal of 22358909 is 90985322.

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 11323225 + 11035684 = 3365^2 + 3322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22358909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22358929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56552 + ... + 56945.

It is an arithmetic number, because the mean of its divisors is an integer number (5618151).

Almost surely, 2^22358909 is an apocalyptic number.

It is an amenable number.

22358909 is a deficient number, since it is larger than the sum of its proper divisors (113695).

22358909 is a wasteful number, since it uses less digits than its factorization.

22358909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113694.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 22358909 is about 4728.5208046492. The cubic root of 22358909 is about 281.7194743995.

The spelling of 22358909 in words is "twenty-two million, three hundred fifty-eight thousand, nine hundred nine".