18227963 has 8 divisors (see below), whose sum is σ = 20048448. Its totient is φ = 16467264.

The previous prime is 18227947. The next prime is 18227977. The reversal of 18227963 is 36972281.

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 18227963 - 2⁴ = 18227947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18227933) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14306 + ... + 15527.

It is an arithmetic number, because the mean of its divisors is an integer number (2506056).

Almost surely, 2^18227963 is an apocalyptic number.

18227963 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18227963 is a deficient number, since it is larger than the sum of its proper divisors (1820485).

18227963 is a wasteful number, since it uses less digits than its factorization.

18227963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29893.

The product of its digits is 36288, while the sum is 38.

The square root of 18227963 is about 4269.4218578163. The cubic root of 18227963 is about 263.1758571718.

The spelling of 18227963 in words is "eighteen million, two hundred twenty-seven thousand, nine hundred sixty-three".