20303000440 has 64 divisors (see below), whose sum is σ = 46692041760. Its totient is φ = 7942571520.

The previous prime is 20303000437. The next prime is 20303000441. The reversal of 20303000440 is 4400030302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20303000441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 656935 + ... + 687145.

Almost surely, 2^20303000440 is an apocalyptic number.

20303000440 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 20303000440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23346020880).

20303000440 is an abundant number, since it is smaller than the sum of its proper divisors (26389041320).

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

20303000440 is a wasteful number, since it uses less digits than its factorization.

20303000440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30592 (or 30588 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

Adding to 20303000440 its reverse (4400030302), we get a palindrome (24703030742).

The spelling of 20303000440 in words is "twenty billion, three hundred three million, four hundred forty", and thus it is an aban number.