20117463 has 4 divisors (see below), whose sum is σ = 26823288. Its totient is φ = 13411640.

The previous prime is 20117441. The next prime is 20117473. The reversal of 20117463 is 36471102.

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 20117463 - 2⁵ = 20117431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20117473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3352908 + ... + 3352913.

It is an arithmetic number, because the mean of its divisors is an integer number (6705822).

Almost surely, 2^20117463 is an apocalyptic number.

20117463 is a deficient number, since it is larger than the sum of its proper divisors (6705825).

20117463 is an equidigital number, since it uses as much as digits as its factorization.

20117463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6705824.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 20117463 is about 4485.2494913884. The cubic root of 20117463 is about 271.9721307591.

Adding to 20117463 its reverse (36471102), we get a palindrome (56588565).

The spelling of 20117463 in words is "twenty million, one hundred seventeen thousand, four hundred sixty-three".