18210061 has 2 divisors, whose sum is σ = 18210062. Its totient is φ = 18210060.

The previous prime is 18210047. The next prime is 18210067. The reversal of 18210061 is 16001281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17065161 + 1144900 = 4131^2 + 1070^2 .

It is an emirp because it is prime and its reverse (16001281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18210061 - 2⁹ = 18209549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18210067) 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, 9105030 + 9105031.

It is an arithmetic number, because the mean of its divisors is an integer number (9105031).

Almost surely, 2^18210061 is an apocalyptic number.

It is an amenable number.

18210061 is a deficient number, since it is larger than the sum of its proper divisors (1).

18210061 is an equidigital number, since it uses as much as digits as its factorization.

18210061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 18210061 is about 4267.3248060114. The cubic root of 18210061 is about 263.0896724198.

The spelling of 18210061 in words is "eighteen million, two hundred ten thousand, sixty-one".