20310330021 has 16 divisors (see below), whose sum is σ = 28262006784. Its totient is φ = 12949609904.

The previous prime is 20310330017. The next prime is 20310330031. The reversal of 20310330021 is 12003301302.

It is a cyclic number.

It is not a de Polignac number, because 20310330021 - 2² = 20310330017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310330011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 565420 + ... + 600266.

It is an arithmetic number, because the mean of its divisors is an integer number (1766375424).

Almost surely, 2^20310330021 is an apocalyptic number.

It is an amenable number.

20310330021 is a deficient number, since it is larger than the sum of its proper divisors (7951676763).

20310330021 is a wasteful number, since it uses less digits than its factorization.

20310330021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43320.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 20310330021 its reverse (12003301302), we get a palindrome (32313631323).

The spelling of 20310330021 in words is "twenty billion, three hundred ten million, three hundred thirty thousand, twenty-one".