18206641 has 8 divisors (see below), whose sum is σ = 19008000. Its totient is φ = 17418720.

The previous prime is 18206623. The next prime is 18206663. The reversal of 18206641 is 14660281.

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 18206641 - 2¹⁵ = 18173873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18206621) 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, 541 + ... + 6058.

It is an arithmetic number, because the mean of its divisors is an integer number (2376000).

Almost surely, 2^18206641 is an apocalyptic number.

It is an amenable number.

18206641 is a deficient number, since it is larger than the sum of its proper divisors (801359).

18206641 is an equidigital number, since it uses as much as digits as its factorization.

18206641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6719.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 18206641 is about 4266.9240677565. The cubic root of 18206641 is about 263.0732012501.

The spelling of 18206641 in words is "eighteen million, two hundred six thousand, six hundred forty-one".