20144671 has 2 divisors, whose sum is σ = 20144672. Its totient is φ = 20144670.

The previous prime is 20144659. The next prime is 20144737. The reversal of 20144671 is 17644102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20144671 - 2¹⁹ = 19620383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20144071) 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 as a sum of consecutive naturals, namely, 10072335 + 10072336.

It is an arithmetic number, because the mean of its divisors is an integer number (10072336).

Almost surely, 2^20144671 is an apocalyptic number.

20144671 is a deficient number, since it is larger than the sum of its proper divisors (1).

20144671 is an equidigital number, since it uses as much as digits as its factorization.

20144671 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 20144671 is about 4488.2815196910. The cubic root of 20144671 is about 272.0946857131.

Adding to 20144671 its reverse (17644102), we get a palindrome (37788773).

The spelling of 20144671 in words is "twenty million, one hundred forty-four thousand, six hundred seventy-one".