22090911809409 has 15 divisors (see below), whose sum is σ = 33000067251283. Its totient is φ = 14727246339024.

The previous prime is 22090911809399. The next prime is 22090911809459. The reversal of 22090911809409 is 90490811909022.

The square root of 22090911809409 is 4700097.

It is a perfect power (a square), and thus also a powerful number.

22090911809409 is a `hidden beast` number, since 220 + 9 + 0 + 9 + 1 + 1 + 8 + 0 + 9 + 409 = 666.

It can be written as a sum of positive squares in only one way, i.e., 170986385025 + 21919925424384 = 413505^2 + 4681872^2 .

It is not a de Polignac number, because 22090911809409 - 2¹⁷ = 22090911678337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22090911809459) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 42039757 + ... + 42561989.

Almost surely, 2^{22090911809409} is an apocalyptic number.

22090911809409 is the 4700097-th square number.

22090911809409 is the 2350049-th centered octagonal number.

It is an amenable number.

22090911809409 is a deficient number, since it is larger than the sum of its proper divisors (10909155441874).

22090911809409 is an frugal number, since it uses more digits than its factorization.

22090911809409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044478 (or 522236 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The spelling of 22090911809409 in words is "twenty-two trillion, ninety billion, nine hundred eleven million, eight hundred nine thousand, four hundred nine".