20748880093 has 2 divisors, whose sum is σ = 20748880094. Its totient is φ = 20748880092.

The previous prime is 20748880039. The next prime is 20748880169. The reversal of 20748880093 is 39008884702.

Together with previous prime (20748880039) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11810690329 + 8938189764 = 108677^2 + 94542^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20748880093 is a prime.

It is a super-2 number, since 2×20748880093² (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 (20748880003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10374440046 + 10374440047.

It is an arithmetic number, because the mean of its divisors is an integer number (10374440047).

Almost surely, 2^20748880093 is an apocalyptic number.

It is an amenable number.

20748880093 is a deficient number, since it is larger than the sum of its proper divisors (1).

20748880093 is an equidigital number, since it uses as much as digits as its factorization.

20748880093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 20748880093 in words is "twenty billion, seven hundred forty-eight million, eight hundred eighty thousand, ninety-three".