21343133441 has 8 divisors (see below), whose sum is σ = 24402590784. Its totient is φ = 18286285680.

The previous prime is 21343133411. The next prime is 21343133503. The reversal of 21343133441 is 14433134312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21343133441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21343133411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 634835 + ... + 667608.

It is an arithmetic number, because the mean of its divisors is an integer number (3050323848).

Almost surely, 2^21343133441 is an apocalyptic number.

It is an amenable number.

21343133441 is a deficient number, since it is larger than the sum of its proper divisors (3059457343).

21343133441 is a wasteful number, since it uses less digits than its factorization.

21343133441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304791.

The product of its digits is 10368, while the sum is 29.

Adding to 21343133441 its reverse (14433134312), we get a palindrome (35776267753).

The spelling of 21343133441 in words is "twenty-one billion, three hundred forty-three million, one hundred thirty-three thousand, four hundred forty-one".