20031163 has 4 divisors (see below), whose sum is σ = 20497048. Its totient is φ = 19565280.

The previous prime is 20031139. The next prime is 20031169. The reversal of 20031163 is 36113002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20031163 - 2¹³ = 20022971 is a prime.

It is a super-2 number, since 2×20031163² = 802494982265138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20031169) 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, 232878 + ... + 232963.

It is an arithmetic number, because the mean of its divisors is an integer number (5124262).

Almost surely, 2^20031163 is an apocalyptic number.

20031163 is a deficient number, since it is larger than the sum of its proper divisors (465885).

20031163 is an equidigital number, since it uses as much as digits as its factorization.

20031163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465884.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 20031163 is about 4475.6187281760. The cubic root of 20031163 is about 271.5826708259.

Adding to 20031163 its reverse (36113002), we get a palindrome (56144165).

The spelling of 20031163 in words is "twenty million, thirty-one thousand, one hundred sixty-three".