18072049 has 2 divisors, whose sum is σ = 18072050. Its totient is φ = 18072048.

The previous prime is 18072029. The next prime is 18072053. The reversal of 18072049 is 94027081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16200625 + 1871424 = 4025^2 + 1368^2 .

It is a cyclic number.

It is not a de Polignac number, because 18072049 - 2¹¹ = 18070001 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 18072049.

It is not a weakly prime, because it can be changed into another prime (18072029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9036024 + 9036025.

It is an arithmetic number, because the mean of its divisors is an integer number (9036025).

Almost surely, 2^18072049 is an apocalyptic number.

It is an amenable number.

18072049 is a deficient number, since it is larger than the sum of its proper divisors (1).

18072049 is an equidigital number, since it uses as much as digits as its factorization.

18072049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 18072049 is about 4251.1232633270. The cubic root of 18072049 is about 262.4233439056.

The spelling of 18072049 in words is "eighteen million, seventy-two thousand, forty-nine".