20391106733 has 2 divisors, whose sum is σ = 20391106734. Its totient is φ = 20391106732.

The previous prime is 20391106699. The next prime is 20391106877. The reversal of 20391106733 is 33760119302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20137596649 + 253510084 = 141907^2 + 15922^2 .

It is a cyclic number.

It is not a de Polignac number, because 20391106733 - 2¹⁸ = 20390844589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20391106693 and 20391106702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20391126733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10195553366 + 10195553367.

It is an arithmetic number, because the mean of its divisors is an integer number (10195553367).

Almost surely, 2^20391106733 is an apocalyptic number.

It is an amenable number.

20391106733 is a deficient number, since it is larger than the sum of its proper divisors (1).

20391106733 is an equidigital number, since it uses as much as digits as its factorization.

20391106733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 35.

The spelling of 20391106733 in words is "twenty billion, three hundred ninety-one million, one hundred six thousand, seven hundred thirty-three".