21115044343 has 8 divisors (see below), whose sum is σ = 21283088400. Its totient is φ = 20947351680.

The previous prime is 21115044331. The next prime is 21115044367. The reversal of 21115044343 is 34344051112.

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-21115044343 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 (21115044323) 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, 33471 + ... + 208207.

It is an arithmetic number, because the mean of its divisors is an integer number (2660386050).

Almost surely, 2^21115044343 is an apocalyptic number.

21115044343 is a deficient number, since it is larger than the sum of its proper divisors (168044057).

21115044343 is a wasteful number, since it uses less digits than its factorization.

21115044343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175697.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 21115044343 its reverse (34344051112), we get a palindrome (55459095455).

The spelling of 21115044343 in words is "twenty-one billion, one hundred fifteen million, forty-four thousand, three hundred forty-three".