20463143 has 4 divisors (see below), whose sum is σ = 20485920. Its totient is φ = 20440368.

The previous prime is 20463139. The next prime is 20463181. The reversal of 20463143 is 34136402.

It is a happy number.

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 20463143 - 2² = 20463139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20463103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9983 + ... + 11856.

It is an arithmetic number, because the mean of its divisors is an integer number (5121480).

Almost surely, 2^20463143 is an apocalyptic number.

20463143 is a deficient number, since it is larger than the sum of its proper divisors (22777).

20463143 is an equidigital number, since it uses as much as digits as its factorization.

20463143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22776.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 20463143 is about 4523.6205632215. The cubic root of 20463143 is about 273.5210655913.

Adding to 20463143 its reverse (34136402), we get a palindrome (54599545).

The spelling of 20463143 in words is "twenty million, four hundred sixty-three thousand, one hundred forty-three".