18256763 has 18 divisors (see below), whose sum is σ = 21818916. Its totient is φ = 15229368.

The previous prime is 18256753. The next prime is 18256769. The reversal of 18256763 is 36765281.

It is not a de Polignac number, because 18256763 - 2²⁰ = 17208187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18256769) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 219920 + ... + 220002.

It is an arithmetic number, because the mean of its divisors is an integer number (1212162).

Almost surely, 2^18256763 is an apocalyptic number.

18256763 is a deficient number, since it is larger than the sum of its proper divisors (3562153).

18256763 is an frugal number, since it uses more digits than its factorization.

18256763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 157 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 18256763 is about 4272.7933486187. The cubic root of 18256763 is about 263.3143893153.

The spelling of 18256763 in words is "eighteen million, two hundred fifty-six thousand, seven hundred sixty-three".