20310303435440 has 80 divisors (see below), whose sum is σ = 47609614727136. Its totient is φ = 8057413478400.

The previous prime is 20310303435379. The next prime is 20310303435467. The reversal of 20310303435440 is 4453430301302.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 20310303435397 and 20310303435406.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17473034 + ... + 18599126.

Almost surely, 2^{20310303435440} is an apocalyptic number.

20310303435440 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 20310303435440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23804807363568).

20310303435440 is an abundant number, since it is smaller than the sum of its proper divisors (27299311291696).

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

20310303435440 is a wasteful number, since it uses less digits than its factorization.

20310303435440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127958 (or 1127952 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 32.

Adding to 20310303435440 its reverse (4453430301302), we get a palindrome (24763733736742).

The spelling of 20310303435440 in words is "twenty trillion, three hundred ten billion, three hundred three million, four hundred thirty-five thousand, four hundred forty".