21200343 has 16 divisors (see below), whose sum is σ = 30023136. Its totient is φ = 13260800.

The previous prime is 21200329. The next prime is 21200369. The reversal of 21200343 is 34300212.

It is a cyclic number.

It is not a de Polignac number, because 21200343 - 2⁶ = 21200279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29893 + ... + 30593.

It is an arithmetic number, because the mean of its divisors is an integer number (1876446).

Almost surely, 2^21200343 is an apocalyptic number.

21200343 is a deficient number, since it is larger than the sum of its proper divisors (8822793).

21200343 is a wasteful number, since it uses less digits than its factorization.

21200343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 21200343 is about 4604.3830205577. The cubic root of 21200343 is about 276.7669933398.

Adding to 21200343 its reverse (34300212), we get a palindrome (55500555).

The spelling of 21200343 in words is "twenty-one million, two hundred thousand, three hundred forty-three".