20123022109 has 2 divisors, whose sum is σ = 20123022110. Its totient is φ = 20123022108.

The previous prime is 20123022083. The next prime is 20123022163. The reversal of 20123022109 is 90122032102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12892921209 + 7230100900 = 113547^2 + 85030^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123022109 - 2⁷ = 20123021981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20123022109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20123022209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061511054 + 10061511055.

It is an arithmetic number, because the mean of its divisors is an integer number (10061511055).

Almost surely, 2^20123022109 is an apocalyptic number.

It is an amenable number.

20123022109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20123022109 is an equidigital number, since it uses as much as digits as its factorization.

20123022109 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.

It can be divided in two parts, 2012 and 3022109, that added together give a square (3024121 = 1739²).

The spelling of 20123022109 in words is "twenty billion, one hundred twenty-three million, twenty-two thousand, one hundred nine".