21032303313 has 32 divisors (see below), whose sum is σ = 32156393472. Its totient is φ = 11978352000.

The previous prime is 21032303311. The next prime is 21032303323. The reversal of 21032303313 is 31330323012.

It is not a de Polignac number, because 21032303313 - 2¹ = 21032303311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21032303313.

It is not an unprimeable number, because it can be changed into a prime (21032303311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10890958 + ... + 10892888.

It is an arithmetic number, because the mean of its divisors is an integer number (1004887296).

Almost surely, 2^21032303313 is an apocalyptic number.

It is an amenable number.

21032303313 is a deficient number, since it is larger than the sum of its proper divisors (11124090159).

21032303313 is a wasteful number, since it uses less digits than its factorization.

21032303313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3405.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21032303313 its reverse (31330323012), we get a palindrome (52362626325).

The spelling of 21032303313 in words is "twenty-one billion, thirty-two million, three hundred three thousand, three hundred thirteen".