20323121029 has 2 divisors, whose sum is σ = 20323121030. Its totient is φ = 20323121028.

The previous prime is 20323121009. The next prime is 20323121041. The reversal of 20323121029 is 92012132302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16265176225 + 4057944804 = 127535^2 + 63702^2 .

It is a cyclic number.

It is not a de Polignac number, because 20323121029 - 2⁵ = 20323120997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20323120994 and 20323121012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20323121009) 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, 10161560514 + 10161560515.

It is an arithmetic number, because the mean of its divisors is an integer number (10161560515).

Almost surely, 2^20323121029 is an apocalyptic number.

It is an amenable number.

20323121029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20323121029 is an equidigital number, since it uses as much as digits as its factorization.

20323121029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 20323121029 in words is "twenty billion, three hundred twenty-three million, one hundred twenty-one thousand, twenty-nine".