20221252409 has 2 divisors, whose sum is σ = 20221252410. Its totient is φ = 20221252408.

The previous prime is 20221252397. The next prime is 20221252427. The reversal of 20221252409 is 90425212202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10140490000 + 10080762409 = 100700^2 + 100403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20221252409 is a prime.

It is not a weakly prime, because it can be changed into another prime (20221252109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110626204 + 10110626205.

It is an arithmetic number, because the mean of its divisors is an integer number (10110626205).

Almost surely, 2^20221252409 is an apocalyptic number.

It is an amenable number.

20221252409 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221252409 is an equidigital number, since it uses as much as digits as its factorization.

20221252409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 20221252409 in words is "twenty billion, two hundred twenty-one million, two hundred fifty-two thousand, four hundred nine".