20022312209 has 4 divisors (see below), whose sum is σ = 20668193280. Its totient is φ = 19376431140.

The previous prime is 20022312197. The next prime is 20022312223. The reversal of 20022312209 is 90221322002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20022312209 - 2²⁴ = 20005534993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20022312229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322940489 + ... + 322940550.

It is an arithmetic number, because the mean of its divisors is an integer number (5167048320).

Almost surely, 2^20022312209 is an apocalyptic number.

It is an amenable number.

20022312209 is a deficient number, since it is larger than the sum of its proper divisors (645881071).

20022312209 is an equidigital number, since it uses as much as digits as its factorization.

20022312209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645881070.

The product of its (nonzero) digits is 864, while the sum is 23.

The spelling of 20022312209 in words is "twenty billion, twenty-two million, three hundred twelve thousand, two hundred nine".