20003030440400 has 120 divisors (see below), whose sum is σ = 55272433171200. Its totient is φ = 6814499028480.

The previous prime is 20003030440381. The next prime is 20003030440423. The reversal of 20003030440400 is 404403030002.

It is a happy number.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22311800 + ... + 23190999.

It is an arithmetic number, because the mean of its divisors is an integer number (460603609760).

Almost surely, 2^{20003030440400} is an apocalyptic number.

20003030440400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20003030440400 is an abundant number, since it is smaller than the sum of its proper divisors (35269402730800).

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

20003030440400 is a wasteful number, since it uses less digits than its factorization.

20003030440400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45502981 (or 45502970 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

Adding to 20003030440400 its reverse (404403030002), we get a palindrome (20407433470402).

The spelling of 20003030440400 in words is "twenty trillion, three billion, thirty million, four hundred forty thousand, four hundred".