22005387 has 6 divisors (see below), whose sum is σ = 31785572. Its totient is φ = 14670252.

The previous prime is 22005383. The next prime is 22005419. The reversal of 22005387 is 78350022.

It is not a de Polignac number, because 22005387 - 2² = 22005383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22005387.

It is not an unprimeable number, because it can be changed into a prime (22005383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1222513 + ... + 1222530.

Almost surely, 2^22005387 is an apocalyptic number.

22005387 is a deficient number, since it is larger than the sum of its proper divisors (9780185).

22005387 is a wasteful number, since it uses less digits than its factorization.

22005387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445049 (or 2445046 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 22005387 is about 4690.9899808036. The cubic root of 22005387 is about 280.2268017837.

The spelling of 22005387 in words is "twenty-two million, five thousand, three hundred eighty-seven".