20350010309 has 2 divisors, whose sum is σ = 20350010310. Its totient is φ = 20350010308.

The previous prime is 20350010269. The next prime is 20350010341. The reversal of 20350010309 is 90301005302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20304825025 + 45185284 = 142495^2 + 6722^2 .

It is a cyclic number.

It is not a de Polignac number, because 20350010309 - 2³² = 16055043013 is a prime.

It is a Sophie Germain 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 (20350010209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10175005154 + 10175005155.

It is an arithmetic number, because the mean of its divisors is an integer number (10175005155).

Almost surely, 2^20350010309 is an apocalyptic number.

It is an amenable number.

20350010309 is a deficient number, since it is larger than the sum of its proper divisors (1).

20350010309 is an equidigital number, since it uses as much as digits as its factorization.

20350010309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 23.

The spelling of 20350010309 in words is "twenty billion, three hundred fifty million, ten thousand, three hundred nine".