20121767713 has 2 divisors, whose sum is σ = 20121767714. Its totient is φ = 20121767712.

The previous prime is 20121767663. The next prime is 20121767719. The reversal of 20121767713 is 31776712102.

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., 17588860129 + 2532907584 = 132623^2 + 50328^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121767713 - 2²⁵ = 20088213281 is a prime.

It is not a weakly prime, because it can be changed into another prime (20121767719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060883856 + 10060883857.

It is an arithmetic number, because the mean of its divisors is an integer number (10060883857).

Almost surely, 2^20121767713 is an apocalyptic number.

It is an amenable number.

20121767713 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121767713 is an equidigital number, since it uses as much as digits as its factorization.

20121767713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 37.

The spelling of 20121767713 in words is "twenty billion, one hundred twenty-one million, seven hundred sixty-seven thousand, seven hundred thirteen".