21200413503 has 8 divisors (see below), whose sum is σ = 29754966400. Its totient is φ = 13389734808.

The previous prime is 21200413441. The next prime is 21200413523. The reversal of 21200413503 is 30531400212.

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

It is not a de Polignac number, because 21200413503 - 2⁹ = 21200412991 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 21200413503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200413523) 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, 185968483 + ... + 185968596.

It is an arithmetic number, because the mean of its divisors is an integer number (3719370800).

Almost surely, 2^21200413503 is an apocalyptic number.

21200413503 is a deficient number, since it is larger than the sum of its proper divisors (8554552897).

21200413503 is a wasteful number, since it uses less digits than its factorization.

21200413503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371937101.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 21200413503 its reverse (30531400212), we get a palindrome (51731813715).

The spelling of 21200413503 in words is "twenty-one billion, two hundred million, four hundred thirteen thousand, five hundred three".