18006355 has 8 divisors (see below), whose sum is σ = 22547232. Its totient is φ = 13778688.

The previous prime is 18006353. The next prime is 18006371. The reversal of 18006355 is 55360081.

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

It is a cyclic number.

It is not a de Polignac number, because 18006355 - 2¹ = 18006353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18006353) 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, 78174 + ... + 78403.

It is an arithmetic number, because the mean of its divisors is an integer number (2818404).

Almost surely, 2^18006355 is an apocalyptic number.

18006355 is a deficient number, since it is larger than the sum of its proper divisors (4540877).

18006355 is a wasteful number, since it uses less digits than its factorization.

18006355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156605.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 18006355 is about 4243.3895649587. The cubic root of 18006355 is about 262.1049780356.

The spelling of 18006355 in words is "eighteen million, six thousand, three hundred fifty-five".