18081653 has 2 divisors, whose sum is σ = 18081654. Its totient is φ = 18081652.

The previous prime is 18081643. The next prime is 18081667. The reversal of 18081653 is 35618081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9746884 + 8334769 = 3122^2 + 2887^2 .

It is a cyclic number.

It is not a de Polignac number, because 18081653 - 2²⁰ = 17033077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18081643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9040826 + 9040827.

It is an arithmetic number, because the mean of its divisors is an integer number (9040827).

Almost surely, 2^18081653 is an apocalyptic number.

It is an amenable number.

18081653 is a deficient number, since it is larger than the sum of its proper divisors (1).

18081653 is an equidigital number, since it uses as much as digits as its factorization.

18081653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 18081653 is about 4252.2526971007. The cubic root of 18081653 is about 262.4698220788.

The spelling of 18081653 in words is "eighteen million, eighty-one thousand, six hundred fifty-three".