20023983 has 32 divisors (see below), whose sum is σ = 34560000. Its totient is φ = 11220768.

The previous prime is 20023981. The next prime is 20023987. The reversal of 20023983 is 38932002.

It is not a de Polignac number, because 20023983 - 2¹ = 20023981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023981) 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 31 ways as a sum of consecutive naturals, for example, 9018 + ... + 11016.

It is an arithmetic number, because the mean of its divisors is an integer number (1080000).

Almost surely, 2^20023983 is an apocalyptic number.

20023983 is a deficient number, since it is larger than the sum of its proper divisors (14536017).

20023983 is a wasteful number, since it uses less digits than its factorization.

20023983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068 (or 2062 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20023983 is about 4474.8165325519. The cubic root of 20023983 is about 271.5502181153.

Adding to 20023983 its reverse (38932002), we get a palindrome (58955985).

The spelling of 20023983 in words is "twenty million, twenty-three thousand, nine hundred eighty-three".