20317375 has 16 divisors (see below), whose sum is σ = 27308736. Its totient is φ = 15002400.

The previous prime is 20317373. The next prime is 20317379. The reversal of 20317375 is 57371302.

It is not a de Polignac number, because 20317375 - 2¹ = 20317373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20317373) 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 15 ways as a sum of consecutive naturals, for example, 4627 + ... + 7876.

It is an arithmetic number, because the mean of its divisors is an integer number (1706796).

Almost surely, 2^20317375 is an apocalyptic number.

20317375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20317375 is a deficient number, since it is larger than the sum of its proper divisors (6991361).

20317375 is a wasteful number, since it uses less digits than its factorization.

20317375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12531 (or 12521 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 28.

The square root of 20317375 is about 4507.4798945752. The cubic root of 20317375 is about 272.8700468769.

Adding to 20317375 its reverse (57371302), we get a palindrome (77688677).

It can be divided in two parts, 203 and 17375, that added together give a triangular number (17578 = T₁₈₇).

The spelling of 20317375 in words is "twenty million, three hundred seventeen thousand, three hundred seventy-five".