20388192113 has 2 divisors, whose sum is σ = 20388192114. Its totient is φ = 20388192112.

The previous prime is 20388192067. The next prime is 20388192217. The reversal of 20388192113 is 31129188302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19946477824 + 441714289 = 141232^2 + 21017^2 .

It is a cyclic number.

It is not a de Polignac number, because 20388192113 - 2⁶ = 20388192049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20388092113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10194096056 + 10194096057.

It is an arithmetic number, because the mean of its divisors is an integer number (10194096057).

Almost surely, 2^20388192113 is an apocalyptic number.

It is an amenable number.

20388192113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20388192113 is an equidigital number, since it uses as much as digits as its factorization.

20388192113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 20388192113 in words is "twenty billion, three hundred eighty-eight million, one hundred ninety-two thousand, one hundred thirteen".