20321140220 has 24 divisors (see below), whose sum is σ = 43479573984. Its totient is φ = 7975088576.

The previous prime is 20321140219. The next prime is 20321140237. The reversal of 20321140220 is 2204112302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9584384 + ... + 9586503.

It is an arithmetic number, because the mean of its divisors is an integer number (1811648916).

Almost surely, 2^20321140220 is an apocalyptic number.

20321140220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321140220 is an abundant number, since it is smaller than the sum of its proper divisors (23158433764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20321140220 is a wasteful number, since it uses less digits than its factorization.

20321140220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19170949 (or 19170947 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20321140220 its reverse (2204112302), we get a palindrome (22525252522).

The spelling of 20321140220 in words is "twenty billion, three hundred twenty-one million, one hundred forty thousand, two hundred twenty".