21624147343 has 4 divisors (see below), whose sum is σ = 21732811600. Its totient is φ = 21515483088.

The previous prime is 21624147329. The next prime is 21624147353. The reversal of 21624147343 is 34374142612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21624147343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21624147353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54331830 + ... + 54332227.

It is an arithmetic number, because the mean of its divisors is an integer number (5433202900).

Almost surely, 2^21624147343 is an apocalyptic number.

21624147343 is a deficient number, since it is larger than the sum of its proper divisors (108664257).

21624147343 is a wasteful number, since it uses less digits than its factorization.

21624147343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108664256.

The product of its digits is 96768, while the sum is 37.

Adding to 21624147343 its reverse (34374142612), we get a palindrome (55998289955).

The spelling of 21624147343 in words is "twenty-one billion, six hundred twenty-four million, one hundred forty-seven thousand, three hundred forty-three".