20019317 has 4 divisors (see below), whose sum is σ = 20032800. Its totient is φ = 20005836.

The previous prime is 20019313. The next prime is 20019341. The reversal of 20019317 is 71391002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20019317 - 2² = 20019313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20019292 and 20019301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20019313) 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 3 ways as a sum of consecutive naturals, for example, 4193 + ... + 7590.

It is an arithmetic number, because the mean of its divisors is an integer number (5008200).

Almost surely, 2^20019317 is an apocalyptic number.

It is an amenable number.

20019317 is a deficient number, since it is larger than the sum of its proper divisors (13483).

20019317 is a wasteful number, since it uses less digits than its factorization.

20019317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13482.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 20019317 is about 4474.2951400193. The cubic root of 20019317 is about 271.5291242143.

The spelling of 20019317 in words is "twenty million, nineteen thousand, three hundred seventeen".