20013133709 has 2 divisors, whose sum is σ = 20013133710. Its totient is φ = 20013133708.

The previous prime is 20013133697. The next prime is 20013133717. The reversal of 20013133709 is 90733131002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14787289609 + 5225844100 = 121603^2 + 72290^2 .

It is a cyclic number.

It is not a de Polignac number, because 20013133709 - 2⁸ = 20013133453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20013733709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006566854 + 10006566855.

It is an arithmetic number, because the mean of its divisors is an integer number (10006566855).

Almost surely, 2^20013133709 is an apocalyptic number.

It is an amenable number.

20013133709 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013133709 is an equidigital number, since it uses as much as digits as its factorization.

20013133709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 29.

The spelling of 20013133709 in words is "twenty billion, thirteen million, one hundred thirty-three thousand, seven hundred nine".