18552481 has 2 divisors, whose sum is σ = 18552482. Its totient is φ = 18552480.

The previous prime is 18552433. The next prime is 18552529. The reversal of 18552481 is 18425581.

It is a balanced prime because it is at equal distance from previous prime (18552433) and next prime (18552529).

It can be written as a sum of positive squares in only one way, i.e., 15928081 + 2624400 = 3991^2 + 1620^2 .

It is a cyclic number.

It is not a de Polignac number, because 18552481 - 2⁹ = 18551969 is a prime.

It is a super-3 number, since 3×18552481³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (18552181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9276240 + 9276241.

It is an arithmetic number, because the mean of its divisors is an integer number (9276241).

Almost surely, 2^18552481 is an apocalyptic number.

It is an amenable number.

18552481 is a deficient number, since it is larger than the sum of its proper divisors (1).

18552481 is an equidigital number, since it uses as much as digits as its factorization.

18552481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12800, while the sum is 34.

The square root of 18552481 is about 4307.2591052780. The cubic root of 18552481 is about 264.7284794585.

The spelling of 18552481 in words is "eighteen million, five hundred fifty-two thousand, four hundred eighty-one".