20330113321981 has 2 divisors, whose sum is σ = 20330113321982. Its totient is φ = 20330113321980.

The previous prime is 20330113321951. The next prime is 20330113322003. The reversal of 20330113321981 is 18912331103302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11335308572025 + 8994804749956 = 3366795^2 + 2999134^2 .

It is a cyclic number.

It is not a de Polignac number, because 20330113321981 - 2⁷ = 20330113321853 is a prime.

It is a super-2 number, since 2×20330113321981² (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 20330113321981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20330113321951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165056660990 + 10165056660991.

It is an arithmetic number, because the mean of its divisors is an integer number (10165056660991).

Almost surely, 2^{20330113321981} is an apocalyptic number.

It is an amenable number.

20330113321981 is a deficient number, since it is larger than the sum of its proper divisors (1).

20330113321981 is an equidigital number, since it uses as much as digits as its factorization.

20330113321981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 20330113321981 in words is "twenty trillion, three hundred thirty billion, one hundred thirteen million, three hundred twenty-one thousand, nine hundred eighty-one".