20212320109 has 2 divisors, whose sum is σ = 20212320110. Its totient is φ = 20212320108.

The previous prime is 20212319987. The next prime is 20212320127. The reversal of 20212320109 is 90102321202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18943393225 + 1268926884 = 137635^2 + 35622^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212320109 - 2²¹ = 20210222957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20212320109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212330109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106160054 + 10106160055.

It is an arithmetic number, because the mean of its divisors is an integer number (10106160055).

Almost surely, 2^20212320109 is an apocalyptic number.

It is an amenable number.

20212320109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212320109 is an equidigital number, since it uses as much as digits as its factorization.

20212320109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 20212320109 in words is "twenty billion, two hundred twelve million, three hundred twenty thousand, one hundred nine".