18196963 has 2 divisors, whose sum is σ = 18196964. Its totient is φ = 18196962.

The previous prime is 18196903. The next prime is 18196993. The reversal of 18196963 is 36969181.

It is a strong prime.

It is an emirp because it is prime and its reverse (36969181) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18196963 is a prime.

It is a super-2 number, since 2×18196963² = 662258924846738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18196903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9098481 + 9098482.

It is an arithmetic number, because the mean of its divisors is an integer number (9098482).

Almost surely, 2^18196963 is an apocalyptic number.

18196963 is a deficient number, since it is larger than the sum of its proper divisors (1).

18196963 is an equidigital number, since it uses as much as digits as its factorization.

18196963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 43.

The square root of 18196963 is about 4265.7898448001. The cubic root of 18196963 is about 263.0265795495.

The spelling of 18196963 in words is "eighteen million, one hundred ninety-six thousand, nine hundred sixty-three".