21433233241 has 4 divisors (see below), whose sum is σ = 24495123712. Its totient is φ = 18371342772.

The previous prime is 21433233197. The next prime is 21433233257. The reversal of 21433233241 is 14233233412.

It is a happy number.

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 21433233241 - 2⁷ = 21433233113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21433233281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1530945225 + ... + 1530945238.

It is an arithmetic number, because the mean of its divisors is an integer number (6123780928).

Almost surely, 2^21433233241 is an apocalyptic number.

It is an amenable number.

21433233241 is a deficient number, since it is larger than the sum of its proper divisors (3061890471).

21433233241 is an equidigital number, since it uses as much as digits as its factorization.

21433233241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061890470.

The product of its digits is 10368, while the sum is 28.

Adding to 21433233241 its reverse (14233233412), we get a palindrome (35666466653).

The spelling of 21433233241 in words is "twenty-one billion, four hundred thirty-three million, two hundred thirty-three thousand, two hundred forty-one".