20634491577311 has 2 divisors, whose sum is σ = 20634491577312. Its totient is φ = 20634491577310.

The previous prime is 20634491577269. The next prime is 20634491577319. The reversal of 20634491577311 is 11377519443602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20634491577311 - 2²⁶ = 20634424468447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20634491577319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10317245788655 + 10317245788656.

It is an arithmetic number, because the mean of its divisors is an integer number (10317245788656).

Almost surely, 2^{20634491577311} is an apocalyptic number.

20634491577311 is a deficient number, since it is larger than the sum of its proper divisors (1).

20634491577311 is an equidigital number, since it uses as much as digits as its factorization.

20634491577311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 20634491577311 in words is "twenty trillion, six hundred thirty-four billion, four hundred ninety-one million, five hundred seventy-seven thousand, three hundred eleven".