18194963 has 2 divisors, whose sum is σ = 18194964. Its totient is φ = 18194962.

The previous prime is 18194903. The next prime is 18194993. The reversal of 18194963 is 36949181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18194963 - 2⁸ = 18194707 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18194963.

It is not a weakly prime, because it can be changed into another prime (18194903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9097481 + 9097482.

It is an arithmetic number, because the mean of its divisors is an integer number (9097482).

Almost surely, 2^18194963 is an apocalyptic number.

18194963 is a deficient number, since it is larger than the sum of its proper divisors (1).

18194963 is an equidigital number, since it uses as much as digits as its factorization.

18194963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 41.

The square root of 18194963 is about 4265.5554151833. Note that the first 3 decimals coincide. The cubic root of 18194963 is about 263.0169429152.

The spelling of 18194963 in words is "eighteen million, one hundred ninety-four thousand, nine hundred sixty-three".