18162049 has 2 divisors, whose sum is σ = 18162050. Its totient is φ = 18162048.

The previous prime is 18162037. The next prime is 18162061. The reversal of 18162049 is 94026181.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (18162037) and next prime (18162061).

It can be written as a sum of positive squares in only one way, i.e., 18122049 + 40000 = 4257^2 + 200^2 .

It is an emirp because it is prime and its reverse (94026181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18162049 - 2⁹ = 18161537 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18162049.

It is not a weakly prime, because it can be changed into another prime (18168049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9081024 + 9081025.

It is an arithmetic number, because the mean of its divisors is an integer number (9081025).

Almost surely, 2^18162049 is an apocalyptic number.

It is an amenable number.

18162049 is a deficient number, since it is larger than the sum of its proper divisors (1).

18162049 is an equidigital number, since it uses as much as digits as its factorization.

18162049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 18162049 is about 4261.6955545886. The cubic root of 18162049 is about 262.8582512865.

The spelling of 18162049 in words is "eighteen million, one hundred sixty-two thousand, forty-nine".