20317075 has 12 divisors (see below), whose sum is σ = 25267480. Its totient is φ = 16205760.

The previous prime is 20317067. The next prime is 20317093. The reversal of 20317075 is 57071302.

It is not a de Polignac number, because 20317075 - 2³ = 20317067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

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, 9232 + ... + 11218.

Almost surely, 2^20317075 is an apocalyptic number.

20317075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20317075 is a deficient number, since it is larger than the sum of its proper divisors (4950405).

20317075 is a wasteful number, since it uses less digits than its factorization.

20317075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406 (or 2401 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 20317075 is about 4507.4466164337. The cubic root of 20317075 is about 272.8687038324.

Adding to 20317075 its reverse (57071302), we get a palindrome (77388377).

The spelling of 20317075 in words is "twenty million, three hundred seventeen thousand, seventy-five".