20422010209 has 2 divisors, whose sum is σ = 20422010210. Its totient is φ = 20422010208.

The previous prime is 20422010197. The next prime is 20422010239. The reversal of 20422010209 is 90201022402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14993267809 + 5428742400 = 122447^2 + 73680^2 .

It is a cyclic number.

It is not a de Polignac number, because 20422010209 - 2¹⁹ = 20421485921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20422010209.

It is not a weakly prime, because it can be changed into another prime (20422010239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211005104 + 10211005105.

It is an arithmetic number, because the mean of its divisors is an integer number (10211005105).

Almost surely, 2^20422010209 is an apocalyptic number.

It is an amenable number.

20422010209 is a deficient number, since it is larger than the sum of its proper divisors (1).

20422010209 is an equidigital number, since it uses as much as digits as its factorization.

20422010209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 20422010209 in words is "twenty billion, four hundred twenty-two million, ten thousand, two hundred nine".