20944843 has 4 divisors (see below), whose sum is σ = 21051360. Its totient is φ = 20838328.

The previous prime is 20944837. The next prime is 20944877. The reversal of 20944843 is 34844902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20944843 - 2⁵ = 20944811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20944799 and 20944808.

It is not an unprimeable number, because it can be changed into a prime (20944883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52963 + ... + 53356.

It is an arithmetic number, because the mean of its divisors is an integer number (5262840).

Almost surely, 2^20944843 is an apocalyptic number.

20944843 is a deficient number, since it is larger than the sum of its proper divisors (106517).

20944843 is a wasteful number, since it uses less digits than its factorization.

20944843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106516.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 20944843 is about 4576.5536159866. The cubic root of 20944843 is about 275.6506598523.

The spelling of 20944843 in words is "twenty million, nine hundred forty-four thousand, eight hundred forty-three".