20013653436731 has 2 divisors, whose sum is σ = 20013653436732. Its totient is φ = 20013653436730.

The previous prime is 20013653436703. The next prime is 20013653436761. The reversal of 20013653436731 is 13763435631002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013653436731 is a prime.

It is a super-2 number, since 2×20013653436731² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20013653436761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006826718365 + 10006826718366.

It is an arithmetic number, because the mean of its divisors is an integer number (10006826718366).

Almost surely, 2^{20013653436731} is an apocalyptic number.

20013653436731 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013653436731 is an equidigital number, since it uses as much as digits as its factorization.

20013653436731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 44.

The spelling of 20013653436731 in words is "twenty trillion, thirteen billion, six hundred fifty-three million, four hundred thirty-six thousand, seven hundred thirty-one".