20899343 has 8 divisors (see below), whose sum is σ = 21671280. Its totient is φ = 20130880.

The previous prime is 20899327. The next prime is 20899367. The reversal of 20899343 is 34399802.

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 20899343 - 2⁴ = 20899327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20899297 and 20899306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20899303) 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, 21596 + ... + 22542.

It is an arithmetic number, because the mean of its divisors is an integer number (2708910).

Almost surely, 2^20899343 is an apocalyptic number.

20899343 is a deficient number, since it is larger than the sum of its proper divisors (771937).

20899343 is an equidigital number, since it uses as much as digits as its factorization.

20899343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1737.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 20899343 is about 4571.5799238338. The cubic root of 20899343 is about 275.4509098384.

The spelling of 20899343 in words is "twenty million, eight hundred ninety-nine thousand, three hundred forty-three".