20113000309 has 2 divisors, whose sum is σ = 20113000310. Its totient is φ = 20113000308.

The previous prime is 20113000283. The next prime is 20113000321. The reversal of 20113000309 is 90300031102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19894256209 + 218744100 = 141047^2 + 14790^2 .

It is a cyclic number.

It is not a de Polignac number, because 20113000309 - 2¹¹ = 20112998261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20113000379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056500154 + 10056500155.

It is an arithmetic number, because the mean of its divisors is an integer number (10056500155).

Almost surely, 2^20113000309 is an apocalyptic number.

It is an amenable number.

20113000309 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113000309 is an equidigital number, since it uses as much as digits as its factorization.

20113000309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 19.

The spelling of 20113000309 in words is "twenty billion, one hundred thirteen million, three hundred nine", and thus it is an aban number.