20303236413440 has 384 divisors, whose sum is σ = 53925773690880. Its totient is φ = 7297445658624.

The previous prime is 20303236413431. The next prime is 20303236413451. The reversal of 20303236413440 is 4431463230302.

It is a happy number.

It is a super-2 number, since 2×20303236413440² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20303236413440.

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, 2254157417 + ... + 2254166423.

It is an arithmetic number, because the mean of its divisors is an integer number (140431702320).

Almost surely, 2^{20303236413440} is an apocalyptic number.

20303236413440 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 20303236413440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26962886845440).

20303236413440 is an abundant number, since it is smaller than the sum of its proper divisors (33622537277440).

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

20303236413440 is a wasteful number, since it uses less digits than its factorization.

20303236413440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9637 (or 9617 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 35.

Adding to 20303236413440 its reverse (4431463230302), we get a palindrome (24734699643742).

The spelling of 20303236413440 in words is "twenty trillion, three hundred three billion, two hundred thirty-six million, four hundred thirteen thousand, four hundred forty".