19054009 has 4 divisors (see below), whose sum is σ = 20519716. Its totient is φ = 17588304.

The previous prime is 19054003. The next prime is 19054027. The reversal of 19054009 is 90045091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90045091 = 47 ⋅1915853.

It can be written as a sum of positive squares in 2 ways, for example, as 2732409 + 16321600 = 1653^2 + 4040^2 .

It is a cyclic number.

It is not a de Polignac number, because 19054009 - 2¹¹ = 19051961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19054003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 732834 + ... + 732859.

It is an arithmetic number, because the mean of its divisors is an integer number (5129929).

Almost surely, 2^19054009 is an apocalyptic number.

It is an amenable number.

19054009 is a deficient number, since it is larger than the sum of its proper divisors (1465707).

19054009 is a wasteful number, since it uses less digits than its factorization.

19054009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465706.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 19054009 is about 4365.0898043454. The cubic root of 19054009 is about 267.0927637574.

The spelling of 19054009 in words is "nineteen million, fifty-four thousand, nine".