19886963 has 2 divisors, whose sum is σ = 19886964. Its totient is φ = 19886962.

The previous prime is 19886947. The next prime is 19887017. The reversal of 19886963 is 36968891.

It is a weak prime.

It is an emirp because it is prime and its reverse (36968891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19886963 - 2⁴ = 19886947 is a prime.

It is not a weakly prime, because it can be changed into another prime (19886063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9943481 + 9943482.

It is an arithmetic number, because the mean of its divisors is an integer number (9943482).

Almost surely, 2^19886963 is an apocalyptic number.

19886963 is a deficient number, since it is larger than the sum of its proper divisors (1).

19886963 is an equidigital number, since it uses as much as digits as its factorization.

19886963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 50.

The square root of 19886963 is about 4459.4801266515. The cubic root of 19886963 is about 270.9294124967.

The spelling of 19886963 in words is "nineteen million, eight hundred eighty-six thousand, nine hundred sixty-three".