18030481 has 8 divisors (see below), whose sum is σ = 21027200. Its totient is φ = 15454404.

The previous prime is 18030479. The next prime is 18030497. The reversal of 18030481 is 18403081.

It is not a de Polignac number, because 18030481 - 2¹ = 18030479 is a prime.

It is a super-2 number, since 2×18030481² = 650196490182722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18030401) 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, 25941 + ... + 26626.

It is an arithmetic number, because the mean of its divisors is an integer number (2628400).

Almost surely, 2^18030481 is an apocalyptic number.

It is an amenable number.

18030481 is a deficient number, since it is larger than the sum of its proper divisors (2996719).

18030481 is an frugal number, since it uses more digits than its factorization.

18030481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52588 (or 52574 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 18030481 is about 4246.2313879486. The cubic root of 18030481 is about 262.2219871430.

The spelling of 18030481 in words is "eighteen million, thirty thousand, four hundred eighty-one".