18086542 has 4 divisors (see below), whose sum is σ = 27129816. Its totient is φ = 9043270.

The previous prime is 18086539. The next prime is 18086543. The reversal of 18086542 is 24568081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24568081 = 367 ⋅66943.

It is a junction number, because it is equal to n+sod(n) for n = 18086498 and 18086507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18086543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4521634 + ... + 4521637.

It is an arithmetic number, because the mean of its divisors is an integer number (6782454).

Almost surely, 2^18086542 is an apocalyptic number.

18086542 is a deficient number, since it is larger than the sum of its proper divisors (9043274).

18086542 is an equidigital number, since it uses as much as digits as its factorization.

18086542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9043273.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 18086542 is about 4252.8275300087. The cubic root of 18086542 is about 262.4934758772.

The spelling of 18086542 in words is "eighteen million, eighty-six thousand, five hundred forty-two".