21296839543 has 8 divisors (see below), whose sum is σ = 24354869760. Its totient is φ = 18242715480.

The previous prime is 21296839523. The next prime is 21296839601. The reversal of 21296839543 is 34593869212.

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

It is a cyclic number.

It is not a de Polignac number, because 21296839543 - 2¹⁷ = 21296708471 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 (21296839523) 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, 964843 + ... + 986668.

It is an arithmetic number, because the mean of its divisors is an integer number (3044358720).

Almost surely, 2^21296839543 is an apocalyptic number.

21296839543 is a deficient number, since it is larger than the sum of its proper divisors (3058030217).

21296839543 is a wasteful number, since it uses less digits than its factorization.

21296839543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953077.

The product of its digits is 2799360, while the sum is 52.

The spelling of 21296839543 in words is "twenty-one billion, two hundred ninety-six million, eight hundred thirty-nine thousand, five hundred forty-three".