18755663 has 8 divisors (see below), whose sum is σ = 19554480. Its totient is φ = 17967040.

The previous prime is 18755657. The next prime is 18755677. The reversal of 18755663 is 36655781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18755663 - 2⁴ = 18755647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18755663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18755623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1331 + ... + 6267.

It is an arithmetic number, because the mean of its divisors is an integer number (2444310).

Almost surely, 2^18755663 is an apocalyptic number.

18755663 is a deficient number, since it is larger than the sum of its proper divisors (798817).

18755663 is a wasteful number, since it uses less digits than its factorization.

18755663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5097.

The product of its digits is 151200, while the sum is 41.

The square root of 18755663 is about 4330.7808764702. The cubic root of 18755663 is about 265.6913855389.

The spelling of 18755663 in words is "eighteen million, seven hundred fifty-five thousand, six hundred sixty-three".