20078143 has 2 divisors, whose sum is σ = 20078144. Its totient is φ = 20078142.

The previous prime is 20078137. The next prime is 20078147. The reversal of 20078143 is 34187002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20078143 - 2¹⁷ = 19947071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20078147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10039071 + 10039072.

It is an arithmetic number, because the mean of its divisors is an integer number (10039072).

Almost surely, 2^20078143 is an apocalyptic number.

20078143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20078143 is an equidigital number, since it uses as much as digits as its factorization.

20078143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20078143 is about 4480.8640907753. The cubic root of 20078143 is about 271.7948234625.

The spelling of 20078143 in words is "twenty million, seventy-eight thousand, one hundred forty-three".