20483143 has 4 divisors (see below), whose sum is σ = 20763808. Its totient is φ = 20202480.

The previous prime is 20483137. The next prime is 20483153. The reversal of 20483143 is 34138402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20483143 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 (20483153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140223 + ... + 140368.

It is an arithmetic number, because the mean of its divisors is an integer number (5190952).

Almost surely, 2^20483143 is an apocalyptic number.

20483143 is a deficient number, since it is larger than the sum of its proper divisors (280665).

20483143 is an equidigital number, since it uses as much as digits as its factorization.

20483143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280664.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 20483143 is about 4525.8306419927. The cubic root of 20483143 is about 273.6101467274.

The spelling of 20483143 in words is "twenty million, four hundred eighty-three thousand, one hundred forty-three".