20023343340 has 576 divisors, whose sum is σ = 77568357888. Its totient is φ = 3793305600.

The previous prime is 20023343309. The next prime is 20023343369. The reversal of 20023343340 is 4334332002.

It is a self number, because there is not a number n which added to its sum of digits gives 20023343340.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 40780495 + ... + 40780985.

It is an arithmetic number, because the mean of its divisors is an integer number (134667288).

Almost surely, 2^20023343340 is an apocalyptic number.

20023343340 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 20023343340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38784178944).

20023343340 is an abundant number, since it is smaller than the sum of its proper divisors (57545014548).

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

20023343340 is a wasteful number, since it uses less digits than its factorization.

20023343340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 629 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 24.

Adding to 20023343340 its reverse (4334332002), we get a palindrome (24357675342).

It can be divided in two parts, 20023 and 343340, that added together give a palindrome (363363).

The spelling of 20023343340 in words is "twenty billion, twenty-three million, three hundred forty-three thousand, three hundred forty".