18283863 has 8 divisors (see below), whose sum is σ = 26253808. Its totient is φ = 11251584.

The previous prime is 18283861. The next prime is 18283877. The reversal of 18283863 is 36838281.

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

It is not a de Polignac number, because 18283863 - 2¹ = 18283861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 468817 = 18283863 / (1 + 8 + 2 + 8 + 3 + 8 + 6 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18283861) 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, 234370 + ... + 234447.

It is an arithmetic number, because the mean of its divisors is an integer number (3281726).

Almost surely, 2^18283863 is an apocalyptic number.

18283863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18283863 is a deficient number, since it is larger than the sum of its proper divisors (7969945).

18283863 is a wasteful number, since it uses less digits than its factorization.

18283863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468833.

The product of its digits is 55296, while the sum is 39.

The square root of 18283863 is about 4275.9634002175. The cubic root of 18283863 is about 263.4446112336. Note that the first 3 decimals are identical.

It can be divided in two parts, 18 and 283863, that added together give a triangular number (283881 = T₇₅₃).

The spelling of 18283863 in words is "eighteen million, two hundred eighty-three thousand, eight hundred sixty-three".