20484143 has 2 divisors, whose sum is σ = 20484144. Its totient is φ = 20484142.

The previous prime is 20484097. The next prime is 20484161. The reversal of 20484143 is 34148402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20484143 - 2¹⁰ = 20483119 is a prime.

It is a super-2 number, since 2×20484143² = 839200228888898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20484193) 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 as a sum of consecutive naturals, namely, 10242071 + 10242072.

It is an arithmetic number, because the mean of its divisors is an integer number (10242072).

Almost surely, 2^20484143 is an apocalyptic number.

20484143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20484143 is an equidigital number, since it uses as much as digits as its factorization.

20484143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 20484143 is about 4525.9411176020. The cubic root of 20484143 is about 273.6145992617.

The spelling of 20484143 in words is "twenty million, four hundred eighty-four thousand, one hundred forty-three".