20412799697 has 2 divisors, whose sum is σ = 20412799698. Its totient is φ = 20412799696.

The previous prime is 20412799609. The next prime is 20412799699. The reversal of 20412799697 is 79699721402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18317998336 + 2094801361 = 135344^2 + 45769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20412799697 is a prime.

Together with 20412799699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20412799699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10206399848 + 10206399849.

It is an arithmetic number, because the mean of its divisors is an integer number (10206399849).

Almost surely, 2^20412799697 is an apocalyptic number.

It is an amenable number.

20412799697 is a deficient number, since it is larger than the sum of its proper divisors (1).

20412799697 is an equidigital number, since it uses as much as digits as its factorization.

20412799697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3429216, while the sum is 56.

The spelling of 20412799697 in words is "twenty billion, four hundred twelve million, seven hundred ninety-nine thousand, six hundred ninety-seven".