19873963 has 2 divisors, whose sum is σ = 19873964. Its totient is φ = 19873962.

The previous prime is 19873957. The next prime is 19873991. The reversal of 19873963 is 36937891.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19873963 is a prime.

It is not a weakly prime, because it can be changed into another prime (19873913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9936981 + 9936982.

It is an arithmetic number, because the mean of its divisors is an integer number (9936982).

Almost surely, 2^19873963 is an apocalyptic number.

19873963 is a deficient number, since it is larger than the sum of its proper divisors (1).

19873963 is an equidigital number, since it uses as much as digits as its factorization.

19873963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 46.

The square root of 19873963 is about 4458.0223193699. The cubic root of 19873963 is about 270.8703645985.

The spelling of 19873963 in words is "nineteen million, eight hundred seventy-three thousand, nine hundred sixty-three".