18285349 has 2 divisors, whose sum is σ = 18285350. Its totient is φ = 18285348.

The previous prime is 18285347. The next prime is 18285359. The reversal of 18285349 is 94358281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9345249 + 8940100 = 3057^2 + 2990^2 .

It is a cyclic number.

It is not a de Polignac number, because 18285349 - 2¹ = 18285347 is a prime.

Together with 18285347, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18285347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9142674 + 9142675.

It is an arithmetic number, because the mean of its divisors is an integer number (9142675).

Almost surely, 2^18285349 is an apocalyptic number.

It is an amenable number.

18285349 is a deficient number, since it is larger than the sum of its proper divisors (1).

18285349 is an equidigital number, since it uses as much as digits as its factorization.

18285349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 40.

The square root of 18285349 is about 4276.1371586983. The cubic root of 18285349 is about 263.4517480932.

The spelling of 18285349 in words is "eighteen million, two hundred eighty-five thousand, three hundred forty-nine".