20250057 has 4 divisors (see below), whose sum is σ = 27000080. Its totient is φ = 13500036.

The previous prime is 20250049. The next prime is 20250059. The reversal of 20250057 is 75005202.

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 not a de Polignac number, because 20250057 - 2³ = 20250049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20250059) 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, 3375007 + ... + 3375012.

It is an arithmetic number, because the mean of its divisors is an integer number (6750020).

Almost surely, 2^20250057 is an apocalyptic number.

It is an amenable number.

20250057 is a deficient number, since it is larger than the sum of its proper divisors (6750023).

20250057 is an equidigital number, since it uses as much as digits as its factorization.

20250057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6750022.

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 20250057 is about 4500.0063333289. The cubic root of 20250057 is about 272.5683446675.

Adding to 20250057 its reverse (75005202), we get a palindrome (95255259).

The spelling of 20250057 in words is "twenty million, two hundred fifty thousand, fifty-seven".