20251163 has 4 divisors (see below), whose sum is σ = 20262528. Its totient is φ = 20239800.

The previous prime is 20251129. The next prime is 20251183. The reversal of 20251163 is 36115202.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20251163 - 2⁸ = 20250907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20251103) 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, 2363 + ... + 6788.

It is an arithmetic number, because the mean of its divisors is an integer number (5065632).

Almost surely, 2^20251163 is an apocalyptic number.

20251163 is a deficient number, since it is larger than the sum of its proper divisors (11365).

20251163 is an equidigital number, since it uses as much as digits as its factorization.

20251163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11364.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 20251163 is about 4500.1292203669. The cubic root of 20251163 is about 272.5733068774.

Adding to 20251163 its reverse (36115202), we get a palindrome (56366365).

The spelling of 20251163 in words is "twenty million, two hundred fifty-one thousand, one hundred sixty-three".