20330222021 has 12 divisors (see below), whose sum is σ = 21603628068. Its totient is φ = 19127980032.

The previous prime is 20330222009. The next prime is 20330222039. The reversal of 20330222021 is 12022203302.

It can be written as a sum of positive squares in 6 ways, for example, as 84916225 + 20245305796 = 9215^2 + 142286^2 .

It is not a de Polignac number, because 20330222021 - 2⁶ = 20330221957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20330222221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1018085 + ... + 1037861.

It is an arithmetic number, because the mean of its divisors is an integer number (1800302339).

Almost surely, 2^20330222021 is an apocalyptic number.

It is an amenable number.

20330222021 is a deficient number, since it is larger than the sum of its proper divisors (1273406047).

20330222021 is a wasteful number, since it uses less digits than its factorization.

20330222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23368 (or 23351 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20330222021 its reverse (12022203302), we get a palindrome (32352425323).

The spelling of 20330222021 in words is "twenty billion, three hundred thirty million, two hundred twenty-two thousand, twenty-one".