18013049 has 2 divisors, whose sum is σ = 18013050. Its totient is φ = 18013048.

The previous prime is 18013003. The next prime is 18013069. The reversal of 18013049 is 94031081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18003049 + 10000 = 4243^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 18013049 - 2⁸ = 18012793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18013069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9006524 + 9006525.

It is an arithmetic number, because the mean of its divisors is an integer number (9006525).

Almost surely, 2^18013049 is an apocalyptic number.

It is an amenable number.

18013049 is a deficient number, since it is larger than the sum of its proper divisors (1).

18013049 is an equidigital number, since it uses as much as digits as its factorization.

18013049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 18013049 is about 4244.1782479062. The cubic root of 18013049 is about 262.1374538540.

The spelling of 18013049 in words is "eighteen million, thirteen thousand, forty-nine".