18141481 has 4 divisors (see below), whose sum is σ = 18371200. Its totient is φ = 17911764.

The previous prime is 18141469. The next prime is 18141491. The reversal of 18141481 is 18414181.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18141481 is a prime.

It is a super-2 number, since 2×18141481² = 658226665746722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18141491) 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, 114741 + ... + 114898.

It is an arithmetic number, because the mean of its divisors is an integer number (4592800).

Almost surely, 2^18141481 is an apocalyptic number.

It is an amenable number.

18141481 is a deficient number, since it is larger than the sum of its proper divisors (229719).

18141481 is an equidigital number, since it uses as much as digits as its factorization.

18141481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229718.

The product of its digits is 1024, while the sum is 28.

The square root of 18141481 is about 4259.2817469616. The cubic root of 18141481 is about 262.7589873270.

The spelling of 18141481 in words is "eighteen million, one hundred forty-one thousand, four hundred eighty-one".