20031330130400 has 144 divisors (see below), whose sum is σ = 49051116465120. Its totient is φ = 7988043571200.

The previous prime is 20031330130337. The next prime is 20031330130507. The reversal of 20031330130400 is 403103313002.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 463913612 + ... + 463956788.

It is an arithmetic number, because the mean of its divisors is an integer number (340632753230).

Almost surely, 2^{20031330130400} is an apocalyptic number.

20031330130400 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 20031330130400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24525558232560).

20031330130400 is an abundant number, since it is smaller than the sum of its proper divisors (29019786334720).

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

20031330130400 is a wasteful number, since it uses less digits than its factorization.

20031330130400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44957 (or 44944 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 20031330130400 its reverse (403103313002), we get a palindrome (20434433443402).

The spelling of 20031330130400 in words is "twenty trillion, thirty-one billion, three hundred thirty million, one hundred thirty thousand, four hundred".