20302221210 has 64 divisors (see below), whose sum is σ = 50940852480. Its totient is φ = 5178444480.

The previous prime is 20302221193. The next prime is 20302221211. The reversal of 20302221210 is 1212220302.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20302221210.

It is not an unprimeable number, because it can be changed into a prime (20302221211) 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 31 ways as a sum of consecutive naturals, for example, 337200 + ... + 392820.

It is an arithmetic number, because the mean of its divisors is an integer number (795950820).

Almost surely, 2^20302221210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20302221210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25470426240).

20302221210 is an abundant number, since it is smaller than the sum of its proper divisors (30638631270).

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

20302221210 is an equidigital number, since it uses as much as digits as its factorization.

20302221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55700 (or 55654 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20302221210 its reverse (1212220302), we get a palindrome (21514441512).

The spelling of 20302221210 in words is "twenty billion, three hundred two million, two hundred twenty-one thousand, two hundred ten".