20310955009 has 2 divisors, whose sum is σ = 20310955010. Its totient is φ = 20310955008.

The previous prime is 20310954959. The next prime is 20310955031. The reversal of 20310955009 is 90055901302.

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., 15743222784 + 4567732225 = 125472^2 + 67585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20310955009 is a prime.

It is not a weakly prime, because it can be changed into another prime (20310955409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155477504 + 10155477505.

It is an arithmetic number, because the mean of its divisors is an integer number (10155477505).

Almost surely, 2^20310955009 is an apocalyptic number.

It is an amenable number.

20310955009 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310955009 is an equidigital number, since it uses as much as digits as its factorization.

20310955009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12150, while the sum is 34.

The spelling of 20310955009 in words is "twenty billion, three hundred ten million, nine hundred fifty-five thousand, nine".