18071241 has 4 divisors (see below), whose sum is σ = 24094992. Its totient is φ = 12047492.

The previous prime is 18071177. The next prime is 18071257. The reversal of 18071241 is 14217081.

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: 14217081 = 3 ⋅4739027.

It is a cyclic number.

It is not a de Polignac number, because 18071241 - 2⁶ = 18071177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18071741) 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, 3011871 + ... + 3011876.

It is an arithmetic number, because the mean of its divisors is an integer number (6023748).

Almost surely, 2^18071241 is an apocalyptic number.

It is an amenable number.

18071241 is a deficient number, since it is larger than the sum of its proper divisors (6023751).

18071241 is an equidigital number, since it uses as much as digits as its factorization.

18071241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6023750.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 18071241 is about 4251.0282285584. The cubic root of 18071241 is about 262.4194328710.

The spelling of 18071241 in words is "eighteen million, seventy-one thousand, two hundred forty-one".