18011927 has 4 divisors (see below), whose sum is σ = 18048240. Its totient is φ = 17975616.

The previous prime is 18011893. The next prime is 18011941. The reversal of 18011927 is 72911081.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18011927 - 2⁶ = 18011863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18011927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18011977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17402 + ... + 18407.

It is an arithmetic number, because the mean of its divisors is an integer number (4512060).

Almost surely, 2^18011927 is an apocalyptic number.

18011927 is a deficient number, since it is larger than the sum of its proper divisors (36313).

18011927 is an equidigital number, since it uses as much as digits as its factorization.

18011927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36312.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 18011927 is about 4244.0460647830. The cubic root of 18011927 is about 262.1320110529.

The spelling of 18011927 in words is "eighteen million, eleven thousand, nine hundred twenty-seven".