20023399 has 8 divisors (see below), whose sum is σ = 23128848. Its totient is φ = 17132160.

The previous prime is 20023391. The next prime is 20023403. The reversal of 20023399 is 99332002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20023399 - 2³ = 20023391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023391) 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 7 ways as a sum of consecutive naturals, for example, 53352 + ... + 53725.

It is an arithmetic number, because the mean of its divisors is an integer number (2891106).

Almost surely, 2^20023399 is an apocalyptic number.

20023399 is a deficient number, since it is larger than the sum of its proper divisors (3105449).

20023399 is a wasteful number, since it uses less digits than its factorization.

20023399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107105.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 20023399 is about 4474.7512780042. The cubic root of 20023399 is about 271.5475781666.

The spelling of 20023399 in words is "twenty million, twenty-three thousand, three hundred ninety-nine".