18056761 has 2 divisors, whose sum is σ = 18056762. Its totient is φ = 18056760.

The previous prime is 18056743. The next prime is 18056803. The reversal of 18056761 is 16765081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16152361 + 1904400 = 4019^2 + 1380^2 .

It is a cyclic number.

It is not a de Polignac number, because 18056761 - 2¹⁷ = 17925689 is a prime.

It is a super-2 number, since 2×18056761² = 652093235622242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18056461) 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, 9028380 + 9028381.

It is an arithmetic number, because the mean of its divisors is an integer number (9028381).

Almost surely, 2^18056761 is an apocalyptic number.

It is an amenable number.

18056761 is a deficient number, since it is larger than the sum of its proper divisors (1).

18056761 is an equidigital number, since it uses as much as digits as its factorization.

18056761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 18056761 is about 4249.3247698899. The cubic root of 18056761 is about 262.3493242614.

The spelling of 18056761 in words is "eighteen million, fifty-six thousand, seven hundred sixty-one".