18047211 has 16 divisors (see below), whose sum is σ = 29616384. Its totient is φ = 9519264.

The previous prime is 18047209. The next prime is 18047233. The reversal of 18047211 is 11274081.

It is not a de Polignac number, because 18047211 - 2¹ = 18047209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18047291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32781 + ... + 33326.

It is an arithmetic number, because the mean of its divisors is an integer number (1851024).

Almost surely, 2^18047211 is an apocalyptic number.

18047211 is a deficient number, since it is larger than the sum of its proper divisors (11569173).

18047211 is a wasteful number, since it uses less digits than its factorization.

18047211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66130.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 18047211 is about 4248.2009133279. The cubic root of 18047211 is about 262.3030649891.

The spelling of 18047211 in words is "eighteen million, forty-seven thousand, two hundred eleven".