21702343 has 8 divisors (see below), whose sum is σ = 23492000. Its totient is φ = 19929888.

The previous prime is 21702341. The next prime is 21702347. The reversal of 21702343 is 34320712.

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 21702343 - 2¹ = 21702341 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 (21702341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1608 + ... + 6781.

It is an arithmetic number, because the mean of its divisors is an integer number (2936500).

Almost surely, 2^21702343 is an apocalyptic number.

21702343 is a deficient number, since it is larger than the sum of its proper divisors (1789657).

21702343 is a wasteful number, since it uses less digits than its factorization.

21702343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8601.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 21702343 is about 4658.5773579495. The cubic root of 21702343 is about 278.9344835735.

The spelling of 21702343 in words is "twenty-one million, seven hundred two thousand, three hundred forty-three".