18618542 has 16 divisors (see below), whose sum is σ = 28685664. Its totient is φ = 9060000.

The previous prime is 18618541. The next prime is 18618557. The reversal of 18618542 is 24581681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18618541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11567 + ... + 13077.

It is an arithmetic number, because the mean of its divisors is an integer number (1792854).

Almost surely, 2^18618542 is an apocalyptic number.

18618542 is a deficient number, since it is larger than the sum of its proper divisors (10067122).

18618542 is a wasteful number, since it uses less digits than its factorization.

18618542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675.

The product of its digits is 15360, while the sum is 35.

The square root of 18618542 is about 4314.9208567481. The cubic root of 18618542 is about 265.0423190989.

The spelling of 18618542 in words is "eighteen million, six hundred eighteen thousand, five hundred forty-two".