20015375117 has 2 divisors, whose sum is σ = 20015375118. Its totient is φ = 20015375116.

The previous prime is 20015375099. The next prime is 20015375129. The reversal of 20015375117 is 71157351002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20006970916 + 8404201 = 141446^2 + 2899^2 .

It is a cyclic number.

It is not a de Polignac number, because 20015375117 - 2⁶ = 20015375053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20015375137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10007687558 + 10007687559.

It is an arithmetic number, because the mean of its divisors is an integer number (10007687559).

Almost surely, 2^20015375117 is an apocalyptic number.

It is an amenable number.

20015375117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20015375117 is an equidigital number, since it uses as much as digits as its factorization.

20015375117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7350, while the sum is 32.

The spelling of 20015375117 in words is "twenty billion, fifteen million, three hundred seventy-five thousand, one hundred seventeen".