21343543023 has 8 divisors (see below), whose sum is σ = 31045153536. Its totient is φ = 12935480600.

The previous prime is 21343543021. The next prime is 21343543057. The reversal of 21343543023 is 32034534312.

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 21343543023 - 2¹ = 21343543021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343543021) 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, 323386983 + ... + 323387048.

It is an arithmetic number, because the mean of its divisors is an integer number (3880644192).

Almost surely, 2^21343543023 is an apocalyptic number.

21343543023 is a deficient number, since it is larger than the sum of its proper divisors (9701610513).

21343543023 is a wasteful number, since it uses less digits than its factorization.

21343543023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646774045.

The product of its (nonzero) digits is 25920, while the sum is 30.

The spelling of 21343543023 in words is "twenty-one billion, three hundred forty-three million, five hundred forty-three thousand, twenty-three".