18814261 has 2 divisors, whose sum is σ = 18814262. Its totient is φ = 18814260.

The previous prime is 18814249. The next prime is 18814273. The reversal of 18814261 is 16241881.

It is a balanced prime because it is at equal distance from previous prime (18814249) and next prime (18814273).

It can be written as a sum of positive squares in only one way, i.e., 18447025 + 367236 = 4295^2 + 606^2 .

It is a cyclic number.

It is not a de Polignac number, because 18814261 - 2¹⁵ = 18781493 is a prime.

It is a super-2 number, since 2×18814261² = 707952833952242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18814661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9407130 + 9407131.

It is an arithmetic number, because the mean of its divisors is an integer number (9407131).

Almost surely, 2^18814261 is an apocalyptic number.

It is an amenable number.

18814261 is a deficient number, since it is larger than the sum of its proper divisors (1).

18814261 is an equidigital number, since it uses as much as digits as its factorization.

18814261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 31.

The square root of 18814261 is about 4337.5408931790. The cubic root of 18814261 is about 265.9677962408.

The spelling of 18814261 in words is "eighteen million, eight hundred fourteen thousand, two hundred sixty-one".