19045932049 has 3 divisors (see below), whose sum is σ = 19046070057. Its totient is φ = 19045794042.

The previous prime is 19045932019. The next prime is 19045932053. The reversal of 19045932049 is 94023954091.

The square root of 19045932049 is 138007.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 19045932049 - 2⁹ = 19045931537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19045932019) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 69004 + ... + 207010.

It is an arithmetic number, because the mean of its divisors is an integer number (6348690019).

Almost surely, 2^19045932049 is an apocalyptic number.

19045932049 is the 138007-th square number.

19045932049 is the 69004-th centered octagonal number.

It is an amenable number.

19045932049 is a deficient number, since it is larger than the sum of its proper divisors (138008).

19045932049 is an frugal number, since it uses more digits than its factorization.

19045932049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276014 (or 138007 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 19045932049 in words is "nineteen billion, forty-five million, nine hundred thirty-two thousand, forty-nine".