18265481 has 8 divisors (see below), whose sum is σ = 19704384. Its totient is φ = 16831440.

The previous prime is 18265477. The next prime is 18265487. The reversal of 18265481 is 18456281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18265481 - 2² = 18265477 is a prime.

It is a super-2 number, since 2×18265481² = 667255592322722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18265487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11900 + ... + 13346.

It is an arithmetic number, because the mean of its divisors is an integer number (2463048).

Almost surely, 2^18265481 is an apocalyptic number.

It is an amenable number.

18265481 is a deficient number, since it is larger than the sum of its proper divisors (1438903).

18265481 is a wasteful number, since it uses less digits than its factorization.

18265481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431.

The product of its digits is 15360, while the sum is 35.

The square root of 18265481 is about 4273.8134025715. The cubic root of 18265481 is about 263.3562954215.

The spelling of 18265481 in words is "eighteen million, two hundred sixty-five thousand, four hundred eighty-one".