18130563 has 24 divisors (see below), whose sum is σ = 29240640. Its totient is φ = 10730160.

The previous prime is 18130559. The next prime is 18130583. The reversal of 18130563 is 36503181.

It is a Cunningham number, because it is equal to 4258²-1.

It is not a de Polignac number, because 18130563 - 2² = 18130559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18130513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2128 + ... + 6386.

It is an arithmetic number, because the mean of its divisors is an integer number (1218360).

Almost surely, 2^18130563 is an apocalyptic number.

18130563 is a deficient number, since it is larger than the sum of its proper divisors (11110077).

18130563 is a wasteful number, since it uses less digits than its factorization.

18130563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4319 (or 4316 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 18130563 is about 4257.9998825740. Note that the first 3 decimals coincide. The cubic root of 18130563 is about 262.7062650911.

The spelling of 18130563 in words is "eighteen million, one hundred thirty thousand, five hundred sixty-three".