20736551645039 has 2 divisors, whose sum is σ = 20736551645040. Its totient is φ = 20736551645038.

The previous prime is 20736551644961. The next prime is 20736551645071. The reversal of 20736551645039 is 93054615563702.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20736551645039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20736551645639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10368275822519 + 10368275822520.

It is an arithmetic number, because the mean of its divisors is an integer number (10368275822520).

Almost surely, 2^{20736551645039} is an apocalyptic number.

20736551645039 is a deficient number, since it is larger than the sum of its proper divisors (1).

20736551645039 is an equidigital number, since it uses as much as digits as its factorization.

20736551645039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412000, while the sum is 56.

The spelling of 20736551645039 in words is "twenty trillion, seven hundred thirty-six billion, five hundred fifty-one million, six hundred forty-five thousand, thirty-nine".