18075481 has 2 divisors, whose sum is σ = 18075482. Its totient is φ = 18075480.

The previous prime is 18075469. The next prime is 18075503. The reversal of 18075481 is 18457081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13995081 + 4080400 = 3741^2 + 2020^2 .

It is a cyclic number.

It is not a de Polignac number, because 18075481 - 2⁷ = 18075353 is a prime.

It is a super-2 number, since 2×18075481² = 653446026762722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18075451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9037740 + 9037741.

It is an arithmetic number, because the mean of its divisors is an integer number (9037741).

Almost surely, 2^18075481 is an apocalyptic number.

It is an amenable number.

18075481 is a deficient number, since it is larger than the sum of its proper divisors (1).

18075481 is an equidigital number, since it uses as much as digits as its factorization.

18075481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 18075481 is about 4251.5269021847. The cubic root of 18075481 is about 262.4399548224.

The spelling of 18075481 in words is "eighteen million, seventy-five thousand, four hundred eighty-one".