20081375 has 8 divisors (see below), whose sum is σ = 25061712. Its totient is φ = 16065000.

The previous prime is 20081363. The next prime is 20081377. The reversal of 20081375 is 57318002.

It is not a de Polignac number, because 20081375 - 2¹² = 20077279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20081377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80201 + ... + 80450.

It is an arithmetic number, because the mean of its divisors is an integer number (3132714).

Almost surely, 2^20081375 is an apocalyptic number.

20081375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20081375 is a deficient number, since it is larger than the sum of its proper divisors (4980337).

20081375 is an equidigital number, since it uses as much as digits as its factorization.

20081375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160666 (or 160656 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 20081375 is about 4481.2247209887. The cubic root of 20081375 is about 271.8094063805.

Adding to 20081375 its reverse (57318002), we get a palindrome (77399377).

The spelling of 20081375 in words is "twenty million, eighty-one thousand, three hundred seventy-five".