18120027 has 8 divisors (see below), whose sum is σ = 24939520. Its totient is φ = 11690280.

The previous prime is 18120023. The next prime is 18120049. The reversal of 18120027 is 72002181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18120027 - 2² = 18120023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18119985 and 18120012.

It is not an unprimeable number, because it can be changed into a prime (18120023) 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, 97327 + ... + 97512.

It is an arithmetic number, because the mean of its divisors is an integer number (3117440).

Almost surely, 2^18120027 is an apocalyptic number.

18120027 is a deficient number, since it is larger than the sum of its proper divisors (6819493).

18120027 is a wasteful number, since it uses less digits than its factorization.

18120027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194873.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 18120027 is about 4256.7625021840. The cubic root of 18120027 is about 262.6553674340.

The spelling of 18120027 in words is "eighteen million, one hundred twenty thousand, twenty-seven".