20321220230 has 16 divisors (see below), whose sum is σ = 36782547120. Its totient is φ = 8083076832.

The previous prime is 20321220221. The next prime is 20321220239. The reversal of 20321220230 is 3202212302.

It is an interprime number because it is at equal distance from previous prime (20321220221) and next prime (20321220239).

It is a super-2 number, since 2×20321220230² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20321220199 and 20321220208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321220239) 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 7 ways as a sum of consecutive naturals, for example, 5674529 + ... + 5678108.

It is an arithmetic number, because the mean of its divisors is an integer number (2298909195).

Almost surely, 2^20321220230 is an apocalyptic number.

20321220230 is a deficient number, since it is larger than the sum of its proper divisors (16461326890).

20321220230 is a wasteful number, since it uses less digits than its factorization.

20321220230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11352823.

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

Adding to 20321220230 its reverse (3202212302), we get a palindrome (23523432532).

The spelling of 20321220230 in words is "twenty billion, three hundred twenty-one million, two hundred twenty thousand, two hundred thirty".