21233233013 has 4 divisors (see below), whose sum is σ = 21234245760. Its totient is φ = 21232220268.

The previous prime is 21233233009. The next prime is 21233233051. The reversal of 21233233013 is 31033233212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21233233013 - 2² = 21233233009 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 21233233013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233233313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474245 + ... + 517082.

It is an arithmetic number, because the mean of its divisors is an integer number (5308561440).

Almost surely, 2^21233233013 is an apocalyptic number.

It is an amenable number.

21233233013 is a deficient number, since it is larger than the sum of its proper divisors (1012747).

21233233013 is an equidigital number, since it uses as much as digits as its factorization.

21233233013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012746.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21233233013 its reverse (31033233212), we get a palindrome (52266466225).

The spelling of 21233233013 in words is "twenty-one billion, two hundred thirty-three million, two hundred thirty-three thousand, thirteen".