18238763 has 4 divisors (see below), whose sum is σ = 18253200. Its totient is φ = 18224328.

The previous prime is 18238711. The next prime is 18238771. The reversal of 18238763 is 36783281.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18238763 - 2⁶ = 18238699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18238783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5120 + ... + 7917.

It is an arithmetic number, because the mean of its divisors is an integer number (4563300).

Almost surely, 2^18238763 is an apocalyptic number.

18238763 is a deficient number, since it is larger than the sum of its proper divisors (14437).

18238763 is a wasteful number, since it uses less digits than its factorization.

18238763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14436.

The product of its digits is 48384, while the sum is 38.

The square root of 18238763 is about 4270.6864787760. The cubic root of 18238763 is about 263.2278238140.

The spelling of 18238763 in words is "eighteen million, two hundred thirty-eight thousand, seven hundred sixty-three".