20302102109 has 2 divisors, whose sum is σ = 20302102110. Its totient is φ = 20302102108.

The previous prime is 20302102099. The next prime is 20302102111. The reversal of 20302102109 is 90120120302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12516686884 + 7785415225 = 111878^2 + 88235^2 .

It is a cyclic number.

It is not a de Polignac number, because 20302102109 - 2²⁴ = 20285324893 is a prime.

It is a Sophie Germain prime.

Together with 20302102111, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20302102169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10151051054 + 10151051055.

It is an arithmetic number, because the mean of its divisors is an integer number (10151051055).

Almost surely, 2^20302102109 is an apocalyptic number.

It is an amenable number.

20302102109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20302102109 is an equidigital number, since it uses as much as digits as its factorization.

20302102109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The spelling of 20302102109 in words is "twenty billion, three hundred two million, one hundred two thousand, one hundred nine".