18198963 has 12 divisors (see below), whose sum is σ = 26733720. Its totient is φ = 11926656.

The previous prime is 18198937. The next prime is 18198977. The reversal of 18198963 is 36989181.

It is not a de Polignac number, because 18198963 - 2⁶ = 18198899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18198263) 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 in 11 ways as a sum of consecutive naturals, for example, 16606 + ... + 17667.

It is an arithmetic number, because the mean of its divisors is an integer number (2227810).

Almost surely, 2^18198963 is an apocalyptic number.

18198963 is a deficient number, since it is larger than the sum of its proper divisors (8534757).

18198963 is a wasteful number, since it uses less digits than its factorization.

18198963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34338 (or 34335 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 18198963 is about 4266.0242615344. The cubic root of 18198963 is about 263.0362154777.

The spelling of 18198963 in words is "eighteen million, one hundred ninety-eight thousand, nine hundred sixty-three".