20575399 has 8 divisors (see below), whose sum is σ = 22699152. Its totient is φ = 18528960.

The previous prime is 20575393. The next prime is 20575403. The reversal of 20575399 is 99357502.

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 20575399 - 2³ = 20575391 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 (20575391) 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, 18769 + ... + 19834.

It is an arithmetic number, because the mean of its divisors is an integer number (2837394).

Almost surely, 2^20575399 is an apocalyptic number.

20575399 is a deficient number, since it is larger than the sum of its proper divisors (2123753).

20575399 is a wasteful number, since it uses less digits than its factorization.

20575399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38657.

The product of its (nonzero) digits is 85050, while the sum is 40.

The square root of 20575399 is about 4536.0113536013. The cubic root of 20575399 is about 274.0203112441.

The spelling of 20575399 in words is "twenty million, five hundred seventy-five thousand, three hundred ninety-nine".