20330233302721 has 2 divisors, whose sum is σ = 20330233302722. Its totient is φ = 20330233302720.

The previous prime is 20330233302713. The next prime is 20330233302739. The reversal of 20330233302721 is 12720333203302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20289484228225 + 40749074496 = 4504385^2 + 201864^2 .

It is a cyclic number.

It is not a de Polignac number, because 20330233302721 - 2³ = 20330233302713 is a prime.

It is a super-2 number, since 2×20330233302721² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20330233302781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10165116651360 + 10165116651361.

It is an arithmetic number, because the mean of its divisors is an integer number (10165116651361).

Almost surely, 2^{20330233302721} is an apocalyptic number.

It is an amenable number.

20330233302721 is a deficient number, since it is larger than the sum of its proper divisors (1).

20330233302721 is an equidigital number, since it uses as much as digits as its factorization.

20330233302721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 31.

The spelling of 20330233302721 in words is "twenty trillion, three hundred thirty billion, two hundred thirty-three million, three hundred two thousand, seven hundred twenty-one".