20736774719 has 2 divisors, whose sum is σ = 20736774720. Its totient is φ = 20736774718.

The previous prime is 20736774659. The next prime is 20736774733. The reversal of 20736774719 is 91747763702.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20736774719 is a prime.

It is a super-2 number, since 2×20736774719² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20736774749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10368387359 + 10368387360.

It is an arithmetic number, because the mean of its divisors is an integer number (10368387360).

Almost surely, 2^20736774719 is an apocalyptic number.

20736774719 is a deficient number, since it is larger than the sum of its proper divisors (1).

20736774719 is an equidigital number, since it uses as much as digits as its factorization.

20736774719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3111696, while the sum is 53.

The spelling of 20736774719 in words is "twenty billion, seven hundred thirty-six million, seven hundred seventy-four thousand, seven hundred nineteen".