18206542 has 16 divisors (see below), whose sum is σ = 28123200. Its totient is φ = 8834560.

The previous prime is 18206533. The next prime is 18206581. The reversal of 18206542 is 24560281.

It is a self number, because there is not a number n which added to its sum of digits gives 18206542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19134 + ... + 20062.

It is an arithmetic number, because the mean of its divisors is an integer number (1757700).

Almost surely, 2^18206542 is an apocalyptic number.

18206542 is a deficient number, since it is larger than the sum of its proper divisors (9916658).

18206542 is a wasteful number, since it uses less digits than its factorization.

18206542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 18206542 is about 4266.9124668781. The cubic root of 18206542 is about 263.0727244224.

The spelling of 18206542 in words is "eighteen million, two hundred six thousand, five hundred forty-two".