20023843 has 8 divisors (see below), whose sum is σ = 23142240. Its totient is φ = 16969920.

The previous prime is 20023837. The next prime is 20023847. The reversal of 20023843 is 34832002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20023843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20023847) 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, 15448 + ... + 16693.

It is an arithmetic number, because the mean of its divisors is an integer number (2892780).

Almost surely, 2^20023843 is an apocalyptic number.

20023843 is a deficient number, since it is larger than the sum of its proper divisors (3118397).

20023843 is an equidigital number, since it uses as much as digits as its factorization.

20023843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32237.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20023843 is about 4474.8008894251. The cubic root of 20023843 is about 271.5495852556.

Adding to 20023843 its reverse (34832002), we get a palindrome (54855845).

The spelling of 20023843 in words is "twenty million, twenty-three thousand, eight hundred forty-three".