18386542 has 16 divisors (see below), whose sum is σ = 28651392. Its totient is φ = 8842680.

The previous prime is 18386527. The next prime is 18386549. The reversal of 18386542 is 24568381.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18386549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4167 + ... + 7357.

It is an arithmetic number, because the mean of its divisors is an integer number (1790712).

Almost surely, 2^18386542 is an apocalyptic number.

18386542 is a deficient number, since it is larger than the sum of its proper divisors (10264850).

18386542 is a wasteful number, since it uses less digits than its factorization.

18386542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3303.

The product of its digits is 46080, while the sum is 37.

The square root of 18386542 is about 4287.9531247438. The cubic root of 18386542 is about 263.9368440141.

The spelling of 18386542 in words is "eighteen million, three hundred eighty-six thousand, five hundred forty-two".