18111849 has 16 divisors (see below), whose sum is σ = 28121472. Its totient is φ = 10153728.

The previous prime is 18111827. The next prime is 18111853. The reversal of 18111849 is 94811181.

It is not a de Polignac number, because 18111849 - 2⁹ = 18111337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18111809) 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, 7024 + ... + 9249.

It is an arithmetic number, because the mean of its divisors is an integer number (1757592).

Almost surely, 2^18111849 is an apocalyptic number.

It is an amenable number.

18111849 is a deficient number, since it is larger than the sum of its proper divisors (10009623).

18111849 is a wasteful number, since it uses less digits than its factorization.

18111849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16336.

The product of its digits is 2304, while the sum is 33.

The square root of 18111849 is about 4255.8018045957. The cubic root of 18111849 is about 262.6158472791.

The spelling of 18111849 in words is "eighteen million, one hundred eleven thousand, eight hundred forty-nine".