22620809 has 4 divisors (see below), whose sum is σ = 22670340. Its totient is φ = 22571280.

The previous prime is 22620797. The next prime is 22620817. The reversal of 22620809 is 90802622.

It is a happy number.

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 2550409 + 20070400 = 1597^2 + 4480^2 .

It is a cyclic number.

It is not a de Polignac number, because 22620809 - 2²⁰ = 21572233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22620839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24074 + ... + 24995.

It is an arithmetic number, because the mean of its divisors is an integer number (5667585).

Almost surely, 2^22620809 is an apocalyptic number.

It is an amenable number.

22620809 is a deficient number, since it is larger than the sum of its proper divisors (49531).

22620809 is an equidigital number, since it uses as much as digits as its factorization.

22620809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49530.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 22620809 is about 4756.1338290675. The cubic root of 22620809 is about 282.8151764691.

The spelling of 22620809 in words is "twenty-two million, six hundred twenty thousand, eight hundred nine".