19986954572863 has 2 divisors, whose sum is σ = 19986954572864. Its totient is φ = 19986954572862.

The previous prime is 19986954572857. The next prime is 19986954572881. The reversal of 19986954572863 is 36827545968991.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19986954572863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19986954572803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9993477286431 + 9993477286432.

It is an arithmetic number, because the mean of its divisors is an integer number (9993477286432).

Almost surely, 2^{19986954572863} is an apocalyptic number.

19986954572863 is a deficient number, since it is larger than the sum of its proper divisors (1).

19986954572863 is an equidigital number, since it uses as much as digits as its factorization.

19986954572863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7054387200, while the sum is 82.

The spelling of 19986954572863 in words is "nineteen trillion, nine hundred eighty-six billion, nine hundred fifty-four million, five hundred seventy-two thousand, eight hundred sixty-three".