18162087 has 4 divisors (see below), whose sum is σ = 24216120. Its totient is φ = 12108056.

The previous prime is 18162071. The next prime is 18162107. The reversal of 18162087 is 78026181.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78026181 = 3 ⋅26008727.

It is a cyclic number.

It is not a de Polignac number, because 18162087 - 2⁴ = 18162071 is a prime.

It is a super-2 number, since 2×18162087² = 659722808391138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18162007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3027012 + ... + 3027017.

It is an arithmetic number, because the mean of its divisors is an integer number (6054030).

Almost surely, 2^18162087 is an apocalyptic number.

18162087 is a deficient number, since it is larger than the sum of its proper divisors (6054033).

18162087 is an equidigital number, since it uses as much as digits as its factorization.

18162087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6054032.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 18162087 is about 4261.7000129056. The cubic root of 18162087 is about 262.8584346103.

The spelling of 18162087 in words is "eighteen million, one hundred sixty-two thousand, eighty-seven".