18250481 has 2 divisors, whose sum is σ = 18250482. Its totient is φ = 18250480.

The previous prime is 18250471. The next prime is 18250493. The reversal of 18250481 is 18405281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12567025 + 5683456 = 3545^2 + 2384^2 .

It is a cyclic number.

It is not a de Polignac number, because 18250481 - 2²² = 14056177 is a prime.

It is a super-2 number, since 2×18250481² = 666160113462722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_1166285 and since 18250481 and 1166285 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (18250451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9125240 + 9125241.

It is an arithmetic number, because the mean of its divisors is an integer number (9125241).

Almost surely, 2^18250481 is an apocalyptic number.

It is an amenable number.

18250481 is a deficient number, since it is larger than the sum of its proper divisors (1).

18250481 is an equidigital number, since it uses as much as digits as its factorization.

18250481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 18250481 is about 4272.0581690796. The cubic root of 18250481 is about 263.2841844217.

The spelling of 18250481 in words is "eighteen million, two hundred fifty thousand, four hundred eighty-one".