20302105220 has 72 divisors (see below), whose sum is σ = 44141630400. Its totient is φ = 7843277760.

The previous prime is 20302105181. The next prime is 20302105231. The reversal of 20302105220 is 2250120302.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16124951 + ... + 16126209.

It is an arithmetic number, because the mean of its divisors is an integer number (613078200).

Almost surely, 2^20302105220 is an apocalyptic number.

20302105220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20302105220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22070815200).

20302105220 is an abundant number, since it is smaller than the sum of its proper divisors (23839525180).

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

20302105220 is a wasteful number, since it uses less digits than its factorization.

20302105220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169 (or 2136 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

Adding to 20302105220 its reverse (2250120302), we get a palindrome (22552225522).

The spelling of 20302105220 in words is "twenty billion, three hundred two million, one hundred five thousand, two hundred twenty".