20631794194699 has 2 divisors, whose sum is σ = 20631794194700. Its totient is φ = 20631794194698.

The previous prime is 20631794194643. The next prime is 20631794194721. The reversal of 20631794194699 is 99649149713602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20631794194699 - 2¹¹ = 20631794192651 is a prime.

It is not a weakly prime, because it can be changed into another prime (20631794194619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10315897097349 + 10315897097350.

It is an arithmetic number, because the mean of its divisors is an integer number (10315897097350).

Almost surely, 2^{20631794194699} is an apocalyptic number.

20631794194699 is a deficient number, since it is larger than the sum of its proper divisors (1).

20631794194699 is an equidigital number, since it uses as much as digits as its factorization.

20631794194699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158723712, while the sum is 70.

The spelling of 20631794194699 in words is "twenty trillion, six hundred thirty-one billion, seven hundred ninety-four million, one hundred ninety-four thousand, six hundred ninety-nine".