18116653 has 2 divisors, whose sum is σ = 18116654. Its totient is φ = 18116652.

The previous prime is 18116597. The next prime is 18116669. The reversal of 18116653 is 35661181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17455684 + 660969 = 4178^2 + 813^2 .

It is a cyclic number.

It is not a de Polignac number, because 18116653 - 2¹⁷ = 17985581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18116353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9058326 + 9058327.

It is an arithmetic number, because the mean of its divisors is an integer number (9058327).

Almost surely, 2^18116653 is an apocalyptic number.

It is an amenable number.

18116653 is a deficient number, since it is larger than the sum of its proper divisors (1).

18116653 is an equidigital number, since it uses as much as digits as its factorization.

18116653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 31.

The square root of 18116653 is about 4256.3661731576. The cubic root of 18116653 is about 262.6390640327.

It can be divided in two parts, 18116 and 653, that added together give a square (18769 = 137²).

The spelling of 18116653 in words is "eighteen million, one hundred sixteen thousand, six hundred fifty-three".