20330230331021 has 16 divisors (see below), whose sum is σ = 21909219636528. Its totient is φ = 18753403392000.

The previous prime is 20330230330981. The next prime is 20330230331029. The reversal of 20330230331021 is 12013303203302.

It can be written as a sum of positive squares in 8 ways, for example, as 11466147268900 + 8864083062121 = 3386170^2 + 2977261^2 .

It is a cyclic number.

It is not a de Polignac number, because 20330230331021 - 2⁴² = 15932183819917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20330230331029) 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 in 15 ways as a sum of consecutive naturals, for example, 500761295 + ... + 500801891.

It is an arithmetic number, because the mean of its divisors is an integer number (1369326227283).

Almost surely, 2^{20330230331021} is an apocalyptic number.

It is an amenable number.

20330230331021 is a deficient number, since it is larger than the sum of its proper divisors (1578989305507).

20330230331021 is a wasteful number, since it uses less digits than its factorization.

20330230331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66272.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 20330230331021 its reverse (12013303203302), we get a palindrome (32343533534323).

The spelling of 20330230331021 in words is "twenty trillion, three hundred thirty billion, two hundred thirty million, three hundred thirty-one thousand, twenty-one".