18248261 has 2 divisors, whose sum is σ = 18248262. Its totient is φ = 18248260.

The previous prime is 18248233. The next prime is 18248273. The reversal of 18248261 is 16284281.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18062500 + 185761 = 4250^2 + 431^2 .

It is a cyclic number.

It is not a de Polignac number, because 18248261 - 2¹⁸ = 17986117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18248231) 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, 9124130 + 9124131.

It is an arithmetic number, because the mean of its divisors is an integer number (9124131).

Almost surely, 2^18248261 is an apocalyptic number.

It is an amenable number.

18248261 is a deficient number, since it is larger than the sum of its proper divisors (1).

18248261 is an equidigital number, since it uses as much as digits as its factorization.

18248261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 32.

The square root of 18248261 is about 4271.7983332550. The cubic root of 18248261 is about 263.2735086375.

The spelling of 18248261 in words is "eighteen million, two hundred forty-eight thousand, two hundred sixty-one".