20043893 has 4 divisors (see below), whose sum is σ = 20383680. Its totient is φ = 19704108.

The previous prime is 20043871. The next prime is 20043913. The reversal of 20043893 is 39834002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20043893 - 2¹² = 20039797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169805 + ... + 169922.

It is an arithmetic number, because the mean of its divisors is an integer number (5095920).

Almost surely, 2^20043893 is an apocalyptic number.

It is an amenable number.

20043893 is a deficient number, since it is larger than the sum of its proper divisors (339787).

20043893 is an equidigital number, since it uses as much as digits as its factorization.

20043893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339786.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 20043893 is about 4477.0406520379. The cubic root of 20043893 is about 271.6401897909.

Adding to 20043893 its reverse (39834002), we get a palindrome (59877895).

The spelling of 20043893 in words is "twenty million, forty-three thousand, eight hundred ninety-three".