20842375 has 8 divisors (see below), whose sum is σ = 26011440. Its totient is φ = 16673800.

The previous prime is 20842361. The next prime is 20842397. The reversal of 20842375 is 57324802.

It is not a de Polignac number, because 20842375 - 2⁵ = 20842343 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 83245 + ... + 83494.

It is an arithmetic number, because the mean of its divisors is an integer number (3251430).

Almost surely, 2^20842375 is an apocalyptic number.

20842375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20842375 is a deficient number, since it is larger than the sum of its proper divisors (5169065).

20842375 is an equidigital number, since it uses as much as digits as its factorization.

20842375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166754 (or 166744 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 20842375 is about 4565.3450033924. The cubic root of 20842375 is about 275.2004048846.

The spelling of 20842375 in words is "twenty million, eight hundred forty-two thousand, three hundred seventy-five".