20843389 has 8 divisors (see below), whose sum is σ = 24053120. Its totient is φ = 17691696.

The previous prime is 20843387. The next prime is 20843393. The reversal of 20843389 is 98334802.

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 20843389 - 2¹ = 20843387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20843387) 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, 13734 + ... + 15175.

It is an arithmetic number, because the mean of its divisors is an integer number (3006640).

Almost surely, 2^20843389 is an apocalyptic number.

It is an amenable number.

20843389 is a deficient number, since it is larger than the sum of its proper divisors (3209731).

20843389 is a wasteful number, since it uses less digits than its factorization.

20843389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29019.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 20843389 is about 4565.4560560803. The cubic root of 20843389 is about 275.2048677267.

The spelling of 20843389 in words is "twenty million, eight hundred forty-three thousand, three hundred eighty-nine".