20326792192661 has 2 divisors, whose sum is σ = 20326792192662. Its totient is φ = 20326792192660.

The previous prime is 20326792192559. The next prime is 20326792192723. The reversal of 20326792192661 is 16629129762302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10662739198225 + 9664052994436 = 3265385^2 + 3108706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20326792192661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20326792192597 and 20326792192606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20326792192061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10163396096330 + 10163396096331.

It is an arithmetic number, because the mean of its divisors is an integer number (10163396096331).

Almost surely, 2^{20326792192661} is an apocalyptic number.

It is an amenable number.

20326792192661 is a deficient number, since it is larger than the sum of its proper divisors (1).

20326792192661 is an equidigital number, since it uses as much as digits as its factorization.

20326792192661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5878656, while the sum is 56.

The spelling of 20326792192661 in words is "twenty trillion, three hundred twenty-six billion, seven hundred ninety-two million, one hundred ninety-two thousand, six hundred sixty-one".