18206811 has 12 divisors (see below), whose sum is σ = 30055792. Its totient is φ = 10403856.

The previous prime is 18206789. The next prime is 18206821. The reversal of 18206811 is 11860281.

It is not a de Polignac number, because 18206811 - 2¹¹ = 18204763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18206821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144436 + ... + 144561.

Almost surely, 2^18206811 is an apocalyptic number.

18206811 is a deficient number, since it is larger than the sum of its proper divisors (11848981).

18206811 is a wasteful number, since it uses less digits than its factorization.

18206811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289010 (or 289007 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 18206811 is about 4266.9439883833. The cubic root of 18206811 is about 263.0740200412.

The spelling of 18206811 in words is "eighteen million, two hundred six thousand, eight hundred eleven".