18154049 has 2 divisors, whose sum is σ = 18154050. Its totient is φ = 18154048.

The previous prime is 18154033. The next prime is 18154051. The reversal of 18154049 is 94045181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14025025 + 4129024 = 3745^2 + 2032^2 .

It is a cyclic number.

It is not a de Polignac number, because 18154049 - 2⁴ = 18154033 is a prime.

Together with 18154051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18154099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9077024 + 9077025.

It is an arithmetic number, because the mean of its divisors is an integer number (9077025).

Almost surely, 2^18154049 is an apocalyptic number.

It is an amenable number.

18154049 is a deficient number, since it is larger than the sum of its proper divisors (1).

18154049 is an equidigital number, since it uses as much as digits as its factorization.

18154049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 18154049 is about 4260.7568576487. The cubic root of 18154049 is about 262.8196511109.

The spelling of 18154049 in words is "eighteen million, one hundred fifty-four thousand, forty-nine".