18483381 has 24 divisors (see below), whose sum is σ = 30937920. Its totient is φ = 10414656.

The previous prime is 18483373. The next prime is 18483391. The reversal of 18483381 is 18338481.

It is not a de Polignac number, because 18483381 - 2³ = 18483373 is a prime.

It is a super-2 number, since 2×18483381² = 683270746382322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18483331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2590 + ... + 6608.

It is an arithmetic number, because the mean of its divisors is an integer number (1289080).

Almost surely, 2^18483381 is an apocalyptic number.

It is an amenable number.

18483381 is a deficient number, since it is larger than the sum of its proper divisors (12454539).

18483381 is a wasteful number, since it uses less digits than its factorization.

18483381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4105 (or 4102 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 18483381 is about 4299.2302799455. The cubic root of 18483381 is about 264.3994040481.

The spelling of 18483381 in words is "eighteen million, four hundred eighty-three thousand, three hundred eighty-one".