21433124441 has 4 divisors (see below), whose sum is σ = 22124515584. Its totient is φ = 20741733300.

The previous prime is 21433124431. The next prime is 21433124483. The reversal of 21433124441 is 14442133412.

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 21433124441 - 2¹⁴ = 21433108057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21433124411) 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, 345695525 + ... + 345695586.

It is an arithmetic number, because the mean of its divisors is an integer number (5531128896).

Almost surely, 2^21433124441 is an apocalyptic number.

It is an amenable number.

21433124441 is a deficient number, since it is larger than the sum of its proper divisors (691391143).

21433124441 is an equidigital number, since it uses as much as digits as its factorization.

21433124441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691391142.

The product of its digits is 9216, while the sum is 29.

Adding to 21433124441 its reverse (14442133412), we get a palindrome (35875257853).

The spelling of 21433124441 in words is "twenty-one billion, four hundred thirty-three million, one hundred twenty-four thousand, four hundred forty-one".