20456005041697 has 2 divisors, whose sum is σ = 20456005041698. Its totient is φ = 20456005041696.

The previous prime is 20456005041631. The next prime is 20456005041701. The reversal of 20456005041697 is 79614050065402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19938359327121 + 517645714576 = 4465239^2 + 719476^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20456005041697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20456005041697.

It is not a weakly prime, because it can be changed into another prime (20456005041607) 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, 10228002520848 + 10228002520849.

It is an arithmetic number, because the mean of its divisors is an integer number (10228002520849).

Almost surely, 2^{20456005041697} is an apocalyptic number.

It is an amenable number.

20456005041697 is a deficient number, since it is larger than the sum of its proper divisors (1).

20456005041697 is an equidigital number, since it uses as much as digits as its factorization.

20456005041697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 20456005041697 in words is "twenty trillion, four hundred fifty-six billion, five million, forty-one thousand, six hundred ninety-seven".