18042601 has 4 divisors (see below), whose sum is σ = 18057600. Its totient is φ = 18027604.

The previous prime is 18042599. The next prime is 18042653. The reversal of 18042601 is 10624081.

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: 10624081 = 13 ⋅817237.

It is a cyclic number.

It is not a de Polignac number, because 18042601 - 2¹ = 18042599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18040601) 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, 5521 + ... + 8158.

It is an arithmetic number, because the mean of its divisors is an integer number (4514400).

Almost surely, 2^18042601 is an apocalyptic number.

It is an amenable number.

18042601 is a deficient number, since it is larger than the sum of its proper divisors (14999).

18042601 is a wasteful number, since it uses less digits than its factorization.

18042601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14998.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 18042601 is about 4247.6582960497. The cubic root of 18042601 is about 262.2807287565.

Adding to 18042601 its reverse (10624081), we get a palindrome (28666682).

The spelling of 18042601 in words is "eighteen million, forty-two thousand, six hundred one".