18258542 has 8 divisors (see below), whose sum is σ = 27476256. Its totient is φ = 9099792.

The previous prime is 18258517. The next prime is 18258547. The reversal of 18258542 is 24585281.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18258547) 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 3 ways as a sum of consecutive naturals, for example, 13958 + ... + 15209.

It is an arithmetic number, because the mean of its divisors is an integer number (3434532).

Almost surely, 2^18258542 is an apocalyptic number.

18258542 is a deficient number, since it is larger than the sum of its proper divisors (9217714).

18258542 is a wasteful number, since it uses less digits than its factorization.

18258542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29482.

The product of its digits is 25600, while the sum is 35.

The square root of 18258542 is about 4273.0015211792. The cubic root of 18258542 is about 263.3229417823.

The spelling of 18258542 in words is "eighteen million, two hundred fifty-eight thousand, five hundred forty-two".