20694296838517 has 2 divisors, whose sum is σ = 20694296838518. Its totient is φ = 20694296838516.

The previous prime is 20694296838487. The next prime is 20694296838541. The reversal of 20694296838517 is 71583869249602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20686432518756 + 7864319761 = 4548234^2 + 88681^2 .

It is a cyclic number.

It is not a de Polignac number, because 20694296838517 - 2³⁵ = 20659937100149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20694296838577) 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, 10347148419258 + 10347148419259.

It is an arithmetic number, because the mean of its divisors is an integer number (10347148419259).

It is a 1-persistent number, because it is pandigital, but 2⋅20694296838517 = 41388593677034 is not.

Almost surely, 2^{20694296838517} is an apocalyptic number.

It is an amenable number.

20694296838517 is a deficient number, since it is larger than the sum of its proper divisors (1).

20694296838517 is an equidigital number, since it uses as much as digits as its factorization.

20694296838517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 313528320, while the sum is 70.

The spelling of 20694296838517 in words is "twenty trillion, six hundred ninety-four billion, two hundred ninety-six million, eight hundred thirty-eight thousand, five hundred seventeen".