20703986687999 has 2 divisors, whose sum is σ = 20703986688000. Its totient is φ = 20703986687998.

The previous prime is 20703986687987. The next prime is 20703986688061. The reversal of 20703986687999 is 99978668930702.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20703986687999 - 2⁴⁴ = 3111800643583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20703986687959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10351993343999 + 10351993344000.

It is an arithmetic number, because the mean of its divisors is an integer number (10351993344000).

Almost surely, 2^{20703986687999} is an apocalyptic number.

20703986687999 is a deficient number, since it is larger than the sum of its proper divisors (1).

20703986687999 is an equidigital number, since it uses as much as digits as its factorization.

20703986687999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4444263936, while the sum is 83.

The spelling of 20703986687999 in words is "twenty trillion, seven hundred three billion, nine hundred eighty-six million, six hundred eighty-seven thousand, nine hundred ninety-nine".