20257273 has 4 divisors (see below), whose sum is σ = 21138048. Its totient is φ = 19376500.

The previous prime is 20257271. The next prime is 20257297. The reversal of 20257273 is 37275202.

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.

It is a cyclic number.

It is not a de Polignac number, because 20257273 - 2¹ = 20257271 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20257271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440353 + ... + 440398.

It is an arithmetic number, because the mean of its divisors is an integer number (5284512).

Almost surely, 2^20257273 is an apocalyptic number.

20257273 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20257273 is a deficient number, since it is larger than the sum of its proper divisors (880775).

20257273 is an equidigital number, since it uses as much as digits as its factorization.

20257273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880774.

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 20257273 is about 4500.8080385637. The cubic root of 20257273 is about 272.6007169154.

It can be divided in two parts, 202 and 57273, that added together give a palindrome (57475).

The spelling of 20257273 in words is "twenty million, two hundred fifty-seven thousand, two hundred seventy-three".