20403043210400 has 72 divisors (see below), whose sum is σ = 49823058307680. Its totient is φ = 8158902229760.

The previous prime is 20403043210391. The next prime is 20403043210423. The reversal of 20403043210400 is 401234030402.

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 11 ways as a sum of consecutive naturals, for example, 793910 + ... + 6437109.

It is an arithmetic number, because the mean of its divisors is an integer number (691986920940).

Almost surely, 2^{20403043210400} is an apocalyptic number.

20403043210400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20403043210400 is an abundant number, since it is smaller than the sum of its proper divisors (29420015097280).

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

20403043210400 is a wasteful number, since it uses less digits than its factorization.

20403043210400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7234566 (or 7234553 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20403043210400 its reverse (401234030402), we get a palindrome (20804277240802).

The spelling of 20403043210400 in words is "twenty trillion, four hundred three billion, forty-three million, two hundred ten thousand, four hundred".