20023893 has 12 divisors (see below), whose sum is σ = 29290560. Its totient is φ = 13179816.

The previous prime is 20023889. The next prime is 20023901. The reversal of 20023893 is 39832002.

It is not a de Polignac number, because 20023893 - 2² = 20023889 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13371 + ... + 14792.

It is an arithmetic number, because the mean of its divisors is an integer number (2440880).

Almost surely, 2^20023893 is an apocalyptic number.

It is an amenable number.

20023893 is a deficient number, since it is larger than the sum of its proper divisors (9266667).

20023893 is a wasteful number, since it uses less digits than its factorization.

20023893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28248 (or 28245 counting only the distinct ones).

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

The square root of 20023893 is about 4474.8064762624. The cubic root of 20023893 is about 271.5498112773.

Adding to 20023893 its reverse (39832002), we get a palindrome (59855895).

The spelling of 20023893 in words is "twenty million, twenty-three thousand, eight hundred ninety-three".