22509789 has 16 divisors (see below), whose sum is σ = 31050432. Its totient is φ = 14496768.

The previous prime is 22509749. The next prime is 22509797. The reversal of 22509789 is 98790522.

It is not a de Polignac number, because 22509789 - 2¹⁷ = 22378717 is a prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 22509789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22509749) 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, 9597 + ... + 11709.

It is an arithmetic number, because the mean of its divisors is an integer number (1940652).

Almost surely, 2^22509789 is an apocalyptic number.

It is an amenable number.

22509789 is a deficient number, since it is larger than the sum of its proper divisors (8540643).

22509789 is a wasteful number, since it uses less digits than its factorization.

22509789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 22509789 is about 4744.4482292465. The cubic root of 22509789 is about 282.3517440692.

The spelling of 22509789 in words is "twenty-two million, five hundred nine thousand, seven hundred eighty-nine".