18530542 has 4 divisors (see below), whose sum is σ = 27795816. Its totient is φ = 9265270.

The previous prime is 18530537. The next prime is 18530573. The reversal of 18530542 is 24503581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24503581 = 191 ⋅128291.

It is a self number, because there is not a number n which added to its sum of digits gives 18530542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4632634 + ... + 4632637.

It is an arithmetic number, because the mean of its divisors is an integer number (6948954).

Almost surely, 2^18530542 is an apocalyptic number.

18530542 is a deficient number, since it is larger than the sum of its proper divisors (9265274).

18530542 is an equidigital number, since it uses as much as digits as its factorization.

18530542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9265273.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 18530542 is about 4304.7116047419. The cubic root of 18530542 is about 264.6240878686.

The spelling of 18530542 in words is "eighteen million, five hundred thirty thousand, five hundred forty-two".