19849057017 has 16 divisors (see below), whose sum is σ = 27889515648. Its totient is φ = 12532044800.

The previous prime is 19849056961. The next prime is 19849057049. The reversal of 19849057017 is 71075094891.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 19849057017 - 2¹² = 19849052921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19849057117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1417128 + ... + 1431065.

It is an arithmetic number, because the mean of its divisors is an integer number (1743094728).

Almost surely, 2^19849057017 is an apocalyptic number.

It is an amenable number.

19849057017 is a deficient number, since it is larger than the sum of its proper divisors (8040458631).

19849057017 is a wasteful number, since it uses less digits than its factorization.

19849057017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848320.

The product of its (nonzero) digits is 635040, while the sum is 51.

The spelling of 19849057017 in words is "nineteen billion, eight hundred forty-nine million, fifty-seven thousand, seventeen".