21513413100403 has 48 divisors (see below), whose sum is σ = 26775431038944. Its totient is φ = 17173787366400.

The previous prime is 21513413100397. The next prime is 21513413100427. The reversal of 21513413100403 is 30400131431512.

It is not a de Polignac number, because 21513413100403 - 2¹⁷ = 21513412969331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21513413110403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 150274125 + ... + 150417217.

It is an arithmetic number, because the mean of its divisors is an integer number (557821479978).

Almost surely, 2^{21513413100403} is an apocalyptic number.

21513413100403 is a deficient number, since it is larger than the sum of its proper divisors (5262017938541).

21513413100403 is a wasteful number, since it uses less digits than its factorization.

21513413100403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145012 (or 145005 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 21513413100403 its reverse (30400131431512), we get a palindrome (51913544531915).

The spelling of 21513413100403 in words is "twenty-one trillion, five hundred thirteen billion, four hundred thirteen million, one hundred thousand, four hundred three".