18075563 has 4 divisors (see below), whose sum is σ = 19718808. Its totient is φ = 16432320.

The previous prime is 18075557. The next prime is 18075569. The reversal of 18075563 is 36557081.

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

It is an interprime number because it is at equal distance from previous prime (18075557) and next prime (18075569).

It is a cyclic number.

It is not a de Polignac number, because 18075563 - 2¹⁴ = 18059179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18075569) 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, 821606 + ... + 821627.

It is an arithmetic number, because the mean of its divisors is an integer number (4929702).

Almost surely, 2^18075563 is an apocalyptic number.

18075563 is a deficient number, since it is larger than the sum of its proper divisors (1643245).

18075563 is a wasteful number, since it uses less digits than its factorization.

18075563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643244.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 18075563 is about 4251.5365457679. The cubic root of 18075563 is about 262.4403516776.

The spelling of 18075563 in words is "eighteen million, seventy-five thousand, five hundred sixty-three".