19315963 has 2 divisors, whose sum is σ = 19315964. Its totient is φ = 19315962.

The previous prime is 19315957. The next prime is 19315973. The reversal of 19315963 is 36951391.

It is a weak prime.

It is an emirp because it is prime and its reverse (36951391) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19315963 is a prime.

It is not a weakly prime, because it can be changed into another prime (19315973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9657981 + 9657982.

It is an arithmetic number, because the mean of its divisors is an integer number (9657982).

Almost surely, 2^19315963 is an apocalyptic number.

19315963 is a deficient number, since it is larger than the sum of its proper divisors (1).

19315963 is an equidigital number, since it uses as much as digits as its factorization.

19315963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21870, while the sum is 37.

The square root of 19315963 is about 4394.9929465245. The cubic root of 19315963 is about 268.3111917570.

The spelling of 19315963 in words is "nineteen million, three hundred fifteen thousand, nine hundred sixty-three".