21107343 has 8 divisors (see below), whose sum is σ = 28256256. Its totient is φ = 14015000.

The previous prime is 21107341. The next prime is 21107351. The reversal of 21107343 is 34370112.

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 21107343 - 2¹ = 21107341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21107341) 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, 13263 + ... + 14768.

It is an arithmetic number, because the mean of its divisors is an integer number (3532032).

Almost surely, 2^21107343 is an apocalyptic number.

21107343 is a deficient number, since it is larger than the sum of its proper divisors (7148913).

21107343 is a wasteful number, since it uses less digits than its factorization.

21107343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28285.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 21107343 is about 4594.2728477965. The cubic root of 21107343 is about 276.3617002200.

Adding to 21107343 its reverse (34370112), we get a palindrome (55477455).

It can be divided in two parts, 2110 and 7343, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 21107343 in words is "twenty-one million, one hundred seven thousand, three hundred forty-three".