22009437 has 12 divisors (see below), whose sum is σ = 31921344. Its totient is φ = 14613000.

The previous prime is 22009423. The next prime is 22009439. The reversal of 22009437 is 73490022.

22009437 is a `hidden beast` number, since 220 + 0 + 9 + 437 = 666.

It is not a de Polignac number, because 22009437 - 2²³ = 13620829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22009437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22009439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2613 + ... + 7130.

It is an arithmetic number, because the mean of its divisors is an integer number (2660112).

Almost surely, 2^22009437 is an apocalyptic number.

It is an amenable number.

22009437 is a deficient number, since it is larger than the sum of its proper divisors (9911907).

22009437 is a wasteful number, since it uses less digits than its factorization.

22009437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10000 (or 9997 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 22009437 is about 4691.4216395459. The cubic root of 22009437 is about 280.2439922551.

Adding to 22009437 its reverse (73490022), we get a palindrome (95499459).

The spelling of 22009437 in words is "twenty-two million, nine thousand, four hundred thirty-seven".