18312353 has 2 divisors, whose sum is σ = 18312354. Its totient is φ = 18312352.

The previous prime is 18312337. The next prime is 18312397. The reversal of 18312353 is 35321381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18258529 + 53824 = 4273^2 + 232^2 .

It is an emirp because it is prime and its reverse (35321381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18312353 - 2⁴ = 18312337 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18312053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9156176 + 9156177.

It is an arithmetic number, because the mean of its divisors is an integer number (9156177).

Almost surely, 2^18312353 is an apocalyptic number.

It is an amenable number.

18312353 is a deficient number, since it is larger than the sum of its proper divisors (1).

18312353 is an equidigital number, since it uses as much as digits as its factorization.

18312353 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 18312353 is about 4279.2935164581. The cubic root of 18312353 is about 263.5813737613.

Subtracting 18312353 from its reverse (35321381), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 18312353 in words is "eighteen million, three hundred twelve thousand, three hundred fifty-three".