20243321340 has 96 divisors (see below), whose sum is σ = 61885071360. Its totient is φ = 4903430400.

The previous prime is 20243321339. The next prime is 20243321359. The reversal of 20243321340 is 4312334202.

It is a self number, because there is not a number n which added to its sum of digits gives 20243321340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 832150 + ... + 856130.

It is an arithmetic number, because the mean of its divisors is an integer number (644636160).

Almost surely, 2^20243321340 is an apocalyptic number.

20243321340 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 20243321340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30942535680).

20243321340 is an abundant number, since it is smaller than the sum of its proper divisors (41641750020).

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

20243321340 is a wasteful number, since it uses less digits than its factorization.

20243321340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25283 (or 25281 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 20243321340 its reverse (4312334202), we get a palindrome (24555655542).

The spelling of 20243321340 in words is "twenty billion, two hundred forty-three million, three hundred twenty-one thousand, three hundred forty".