19018049 has 2 divisors, whose sum is σ = 19018050. Its totient is φ = 19018048.

The previous prime is 19018009. The next prime is 19018067. The reversal of 19018049 is 94081091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10608049 + 8410000 = 3257^2 + 2900^2 .

It is a cyclic number.

It is not a de Polignac number, because 19018049 - 2¹⁶ = 18952513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19018009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9509024 + 9509025.

It is an arithmetic number, because the mean of its divisors is an integer number (9509025).

Almost surely, 2^19018049 is an apocalyptic number.

It is an amenable number.

19018049 is a deficient number, since it is larger than the sum of its proper divisors (1).

19018049 is an equidigital number, since it uses as much as digits as its factorization.

19018049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 19018049 is about 4360.9688143806. The cubic root of 19018049 is about 266.9246328353.

The spelling of 19018049 in words is "nineteen million, eighteen thousand, forty-nine".