19718057241 has 9 divisors (see below), whose sum is σ = 28482246741. Its totient is φ = 13145090652.

The previous prime is 19718057209. The next prime is 19718057287. The reversal of 19718057241 is 14275081791.

It is a happy number.

The square root of 19718057241 is 140421.

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

19718057241 is a `hidden beast` number, since 1 + 9 + 71 + 8 + 0 + 572 + 4 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 19718057241 - 2⁵ = 19718057209 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19718057201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 397860 + ... + 444666.

Almost surely, 2^19718057241 is an apocalyptic number.

19718057241 is the 140421-st square number.

19718057241 is the 70211-st centered octagonal number.

It is an amenable number.

19718057241 is a deficient number, since it is larger than the sum of its proper divisors (8764189500).

19718057241 is an frugal number, since it uses more digits than its factorization.

19718057241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93620 (or 46810 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The spelling of 19718057241 in words is "nineteen billion, seven hundred eighteen million, fifty-seven thousand, two hundred forty-one".