20375 has 8 divisors (see below), whose sum is σ = 25584. Its totient is φ = 16200.

The previous prime is 20369. The next prime is 20389. The reversal of 20375 is 57302.

It is not a de Polignac number, because 20375 - 2⁴ = 20359 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 20375.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44 + ... + 206.

It is an arithmetic number, because the mean of its divisors is an integer number (3198).

2²⁰³⁷⁵ is an apocalyptic number.

20375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20375 is a deficient number, since it is larger than the sum of its proper divisors (5209).

20375 is an equidigital number, since it uses as much as digits as its factorization.

20375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 17.

The square root of 20375 is about 142.7410242362. The cubic root of 20375 is about 27.3127778564.

Adding to 20375 its reverse (57302), we get a palindrome (77677).

It can be divided in two parts, 203 and 75, that multiplied together give a triangular number (15225 = T₁₇₄).

The spelling of 20375 in words is "twenty thousand, three hundred seventy-five".