20330444420 has 96 divisors (see below), whose sum is σ = 50198472576. Its totient is φ = 6818688000.

The previous prime is 20330444417. The next prime is 20330444437. The reversal of 20330444420 is 2444403302.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 20330444420.

It is an unprimeable number.

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, 5148887 + ... + 5152833.

It is an arithmetic number, because the mean of its divisors is an integer number (522900756).

Almost surely, 2^20330444420 is an apocalyptic number.

20330444420 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 20330444420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25099236288).

20330444420 is an abundant number, since it is smaller than the sum of its proper divisors (29868028156).

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

20330444420 is a wasteful number, since it uses less digits than its factorization.

20330444420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5781 (or 5779 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 26.

Adding to 20330444420 its reverse (2444403302), we get a palindrome (22774847722).

The spelling of 20330444420 in words is "twenty billion, three hundred thirty million, four hundred forty-four thousand, four hundred twenty".