20812375 has 16 divisors (see below), whose sum is σ = 26155584. Its totient is φ = 16533600.

The previous prime is 20812357. The next prime is 20812381. The reversal of 20812375 is 57321802.

It is not a de Polignac number, because 20812375 - 2⁷ = 20812247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20377 + ... + 21373.

It is an arithmetic number, because the mean of its divisors is an integer number (1634724).

Almost surely, 2^20812375 is an apocalyptic number.

20812375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20812375 is a deficient number, since it is larger than the sum of its proper divisors (5343209).

20812375 is an equidigital number, since it uses as much as digits as its factorization.

20812375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179 (or 1169 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 20812375 is about 4562.0581977875. The cubic root of 20812375 is about 275.0683025933.

The spelling of 20812375 in words is "twenty million, eight hundred twelve thousand, three hundred seventy-five".