20075257 has 4 divisors (see below), whose sum is σ = 20086096. Its totient is φ = 20064420.

The previous prime is 20075227. The next prime is 20075261. The reversal of 20075257 is 75257002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75257002 = 2 ⋅37628501.

It is a cyclic number.

It is not a de Polignac number, because 20075257 - 2¹⁵ = 20042489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20075207) 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 3 ways as a sum of consecutive naturals, for example, 1863 + ... + 6604.

It is an arithmetic number, because the mean of its divisors is an integer number (5021524).

Almost surely, 2^20075257 is an apocalyptic number.

It is an amenable number.

20075257 is a deficient number, since it is larger than the sum of its proper divisors (10839).

20075257 is an equidigital number, since it uses as much as digits as its factorization.

20075257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10838.

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 20075257 is about 4480.5420431015. The cubic root of 20075257 is about 271.7818003882.

It can be divided in two parts, 200 and 75257, that added together give a palindrome (75457).

The spelling of 20075257 in words is "twenty million, seventy-five thousand, two hundred fifty-seven".