19042049 has 4 divisors (see below), whose sum is σ = 20506836. Its totient is φ = 17577264.

The previous prime is 19042043. The next prime is 19042061. The reversal of 19042049 is 94024091.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 937024 + 18105025 = 968^2 + 4255^2 .

It is a cyclic number.

It is not a de Polignac number, because 19042049 - 2⁸ = 19041793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19042043) 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, 732374 + ... + 732399.

It is an arithmetic number, because the mean of its divisors is an integer number (5126709).

Almost surely, 2^19042049 is an apocalyptic number.

It is an amenable number.

19042049 is a deficient number, since it is larger than the sum of its proper divisors (1464787).

19042049 is a wasteful number, since it uses less digits than its factorization.

19042049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464786.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 19042049 is about 4363.7196289404. The cubic root of 19042049 is about 267.0368682928.

The spelling of 19042049 in words is "nineteen million, forty-two thousand, forty-nine".