18142001 has 4 divisors (see below), whose sum is σ = 18563952. Its totient is φ = 17720052.

The previous prime is 18141997. The next prime is 18142021. The reversal of 18142001 is 10024181.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10024181 = 409 ⋅24509.

It is a cyclic number.

It is not a de Polignac number, because 18142001 - 2² = 18141997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18142021) 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, 210911 + ... + 210996.

It is an arithmetic number, because the mean of its divisors is an integer number (4640988).

Almost surely, 2^18142001 is an apocalyptic number.

It is an amenable number.

18142001 is a deficient number, since it is larger than the sum of its proper divisors (421951).

18142001 is an equidigital number, since it uses as much as digits as its factorization.

18142001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421950.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 18142001 is about 4259.3427896801. The cubic root of 18142001 is about 262.7614978418.

Adding to 18142001 its reverse (10024181), we get a palindrome (28166182).

The spelling of 18142001 in words is "eighteen million, one hundred forty-two thousand, one".