18182001 has 4 divisors (see below), whose sum is σ = 24242672. Its totient is φ = 12121332.

The previous prime is 18181987. The next prime is 18182009. The reversal of 18182001 is 10028181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18182001 - 2⁷ = 18181873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18182009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030331 + ... + 3030336.

It is an arithmetic number, because the mean of its divisors is an integer number (6060668).

Almost surely, 2^18182001 is an apocalyptic number.

It is an amenable number.

18182001 is a deficient number, since it is larger than the sum of its proper divisors (6060671).

18182001 is an equidigital number, since it uses as much as digits as its factorization.

18182001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060670.

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 18182001 is about 4264.0357643904. The cubic root of 18182001 is about 262.9544707628.

The spelling of 18182001 in words is "eighteen million, one hundred eighty-two thousand, one".