21042010343 has 8 divisors (see below), whose sum is σ = 21079438128. Its totient is φ = 21004611264.

The previous prime is 21042010333. The next prime is 21042010349. The reversal of 21042010343 is 34301024012.

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 21042010343 - 2⁶ = 21042010279 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 (21042010349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1877705 + ... + 1888877.

It is an arithmetic number, because the mean of its divisors is an integer number (2634929766).

Almost surely, 2^21042010343 is an apocalyptic number.

21042010343 is a deficient number, since it is larger than the sum of its proper divisors (37427785).

21042010343 is a wasteful number, since it uses less digits than its factorization.

21042010343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14353.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21042010343 its reverse (34301024012), we get a palindrome (55343034355).

The spelling of 21042010343 in words is "twenty-one billion, forty-two million, ten thousand, three hundred forty-three".