20234445220 has 72 divisors (see below), whose sum is σ = 46867500792. Its totient is φ = 7332610560.

The previous prime is 20234445193. The next prime is 20234445221. The reversal of 20234445220 is 2254443202.

It can be written as a sum of positive squares in 4 ways, for example, as 2862678016 + 17371767204 = 53504^2 + 131802^2 .

It is a super-2 number, since 2×20234445220² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20234445221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 694792 + ... + 723328.

It is an arithmetic number, because the mean of its divisors is an integer number (650937511).

Almost surely, 2^20234445220 is an apocalyptic number.

20234445220 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 20234445220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23433750396).

20234445220 is an abundant number, since it is smaller than the sum of its proper divisors (26633055572).

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

20234445220 is a wasteful number, since it uses less digits than its factorization.

20234445220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28861 (or 28848 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 28.

Adding to 20234445220 its reverse (2254443202), we get a palindrome (22488888422).

The spelling of 20234445220 in words is "twenty billion, two hundred thirty-four million, four hundred forty-five thousand, two hundred twenty".