21200300204403 has 8 divisors (see below), whose sum is σ = 28309068527248. Its totient is φ = 14112532675584.

The previous prime is 21200300204393. The next prime is 21200300204581. The reversal of 21200300204403 is 30440200300212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21200300204403 - 2⁵ = 21200300204371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21200300204403.

It is not an unprimeable number, because it can be changed into a prime (21200300208403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5250196150 + ... + 5250200187.

It is an arithmetic number, because the mean of its divisors is an integer number (3538633565906).

Almost surely, 2^{21200300204403} is an apocalyptic number.

21200300204403 is a deficient number, since it is larger than the sum of its proper divisors (7108768322845).

21200300204403 is a wasteful number, since it uses less digits than its factorization.

21200300204403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10500397013.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21200300204403 its reverse (30440200300212), we get a palindrome (51640500504615).

The spelling of 21200300204403 in words is "twenty-one trillion, two hundred billion, three hundred million, two hundred four thousand, four hundred three".