18018353 has 2 divisors, whose sum is σ = 18018354. Its totient is φ = 18018352.

The previous prime is 18018349. The next prime is 18018373. The reversal of 18018353 is 35381081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16834609 + 1183744 = 4103^2 + 1088^2 .

It is a cyclic number.

It is not a de Polignac number, because 18018353 - 2² = 18018349 is a prime.

It is a super-2 number, since 2×18018353² = 649322089665218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18018323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9009176 + 9009177.

It is an arithmetic number, because the mean of its divisors is an integer number (9009177).

Almost surely, 2^18018353 is an apocalyptic number.

It is an amenable number.

18018353 is a deficient number, since it is larger than the sum of its proper divisors (1).

18018353 is an equidigital number, since it uses as much as digits as its factorization.

18018353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 18018353 is about 4244.8030578579. The cubic root of 18018353 is about 262.1631804002.

The spelling of 18018353 in words is "eighteen million, eighteen thousand, three hundred fifty-three".