20331440012881 has 2 divisors, whose sum is σ = 20331440012882. Its totient is φ = 20331440012880.

The previous prime is 20331440012827. The next prime is 20331440012963. The reversal of 20331440012881 is 18821004413302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19406844302400 + 924595710481 = 4405320^2 + 961559^2 .

It is a cyclic number.

It is not a de Polignac number, because 20331440012881 - 2¹⁹ = 20331439488593 is a prime.

It is a super-2 number, since 2×20331440012881² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20331440012881.

It is not a weakly prime, because it can be changed into another prime (20331440012981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165720006440 + 10165720006441.

It is an arithmetic number, because the mean of its divisors is an integer number (10165720006441).

Almost surely, 2^{20331440012881} is an apocalyptic number.

It is an amenable number.

20331440012881 is a deficient number, since it is larger than the sum of its proper divisors (1).

20331440012881 is an equidigital number, since it uses as much as digits as its factorization.

20331440012881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 37.

The spelling of 20331440012881 in words is "twenty trillion, three hundred thirty-one billion, four hundred forty million, twelve thousand, eight hundred eighty-one".