18002542 has 8 divisors (see below), whose sum is σ = 27027000. Its totient is φ = 8993544.

The previous prime is 18002527. The next prime is 18002561. The reversal of 18002542 is 24520081.

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

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292 + ... + 6007.

It is an arithmetic number, because the mean of its divisors is an integer number (3378375).

Almost surely, 2^18002542 is an apocalyptic number.

18002542 is a deficient number, since it is larger than the sum of its proper divisors (9024458).

18002542 is a wasteful number, since it uses less digits than its factorization.

18002542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7730.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 18002542 is about 4242.9402541162. The cubic root of 18002542 is about 262.0864757376.

The spelling of 18002542 in words is "eighteen million, two thousand, five hundred forty-two".