18696975 has 48 divisors (see below), whose sum is σ = 34176384. Its totient is φ = 8944000.

The previous prime is 18696949. The next prime is 18696983. The reversal of 18696975 is 57969681.

It is a Cunningham number, because it is equal to 4324²-1.

It is not a de Polignac number, because 18696975 - 2⁹ = 18696463 is a prime.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 107989 + ... + 108161.

It is an arithmetic number, because the mean of its divisors is an integer number (712008).

Almost surely, 2^18696975 is an apocalyptic number.

18696975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18696975 is a deficient number, since it is larger than the sum of its proper divisors (15479409).

18696975 is a wasteful number, since it uses less digits than its factorization.

18696975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 323 counting only the distinct ones).

The product of its digits is 816480, while the sum is 51.

The square root of 18696975 is about 4323.9998843663. Note that the first 3 decimals coincide. The cubic root of 18696975 is about 265.4139726462.

The spelling of 18696975 in words is "eighteen million, six hundred ninety-six thousand, nine hundred seventy-five".