20422911209 has 4 divisors (see below), whose sum is σ = 20552993604. Its totient is φ = 20292828816.

The previous prime is 20422911181. The next prime is 20422911217. The reversal of 20422911209 is 90211922402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10256625625 + 10166285584 = 101275^2 + 100828^2 .

It is a cyclic number.

It is not a de Polignac number, because 20422911209 - 2⁸ = 20422910953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20422916209) 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, 65040962 + ... + 65041275.

It is an arithmetic number, because the mean of its divisors is an integer number (5138248401).

Almost surely, 2^20422911209 is an apocalyptic number.

It is an amenable number.

20422911209 is a deficient number, since it is larger than the sum of its proper divisors (130082395).

20422911209 is a wasteful number, since it uses less digits than its factorization.

20422911209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130082394.

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 20422911209 in words is "twenty billion, four hundred twenty-two million, nine hundred eleven thousand, two hundred nine".