20394843 has 16 divisors (see below), whose sum is σ = 31454976. Its totient is φ = 11512800.

The previous prime is 20394841. The next prime is 20394863. The reversal of 20394843 is 34849302.

It is not a de Polignac number, because 20394843 - 2¹ = 20394841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20394841) 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, 4108 + ... + 7593.

It is an arithmetic number, because the mean of its divisors is an integer number (1965936).

Almost surely, 2^20394843 is an apocalyptic number.

20394843 is a deficient number, since it is larger than the sum of its proper divisors (11060133).

20394843 is a wasteful number, since it uses less digits than its factorization.

20394843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11794.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 20394843 is about 4516.0649906750. The cubic root of 20394843 is about 273.2164152278.

The spelling of 20394843 in words is "twenty million, three hundred ninety-four thousand, eight hundred forty-three".