20143681887019 has 2 divisors, whose sum is σ = 20143681887020. Its totient is φ = 20143681887018.

The previous prime is 20143681887001. The next prime is 20143681887067. The reversal of 20143681887019 is 91078818634102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20143681887019 - 2⁵ = 20143681886987 is a prime.

It is a super-5 number, since 5×20143681887019⁵ (a number of 68 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (20143681887319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10071840943509 + 10071840943510.

It is an arithmetic number, because the mean of its divisors is an integer number (10071840943510).

Almost surely, 2^{20143681887019} is an apocalyptic number.

20143681887019 is a deficient number, since it is larger than the sum of its proper divisors (1).

20143681887019 is an equidigital number, since it uses as much as digits as its factorization.

20143681887019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4644864, while the sum is 58.

The spelling of 20143681887019 in words is "twenty trillion, one hundred forty-three billion, six hundred eighty-one million, eight hundred eighty-seven thousand, nineteen".