20843313 has 16 divisors (see below), whose sum is σ = 29106816. Its totient is φ = 13242240.

The previous prime is 20843287. The next prime is 20843341. The reversal of 20843313 is 31334802.

It is not a de Polignac number, because 20843313 - 2¹⁶ = 20777777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20843353) 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, 31203 + ... + 31863.

It is an arithmetic number, because the mean of its divisors is an integer number (1819176).

Almost surely, 2^20843313 is an apocalyptic number.

20843313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20843313 is a deficient number, since it is larger than the sum of its proper divisors (8263503).

20843313 is a wasteful number, since it uses less digits than its factorization.

20843313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20843313 is about 4565.4477326983. The cubic root of 20843313 is about 275.2045332387.

The spelling of 20843313 in words is "twenty million, eight hundred forty-three thousand, three hundred thirteen".