19816992393 has 32 divisors (see below), whose sum is σ = 30105630720. Its totient is φ = 11487591360.

The previous prime is 19816992367. The next prime is 19816992407. The reversal of 19816992393 is 39329961891.

It is not a de Polignac number, because 19816992393 - 2⁶ = 19816992329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19816992313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65505 + ... + 209582.

It is an arithmetic number, because the mean of its divisors is an integer number (940800960).

Almost surely, 2^19816992393 is an apocalyptic number.

It is an amenable number.

19816992393 is a deficient number, since it is larger than the sum of its proper divisors (10288638327).

19816992393 is a wasteful number, since it uses less digits than its factorization.

19816992393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275197.

The product of its digits is 5668704, while the sum is 60.

The spelling of 19816992393 in words is "nineteen billion, eight hundred sixteen million, nine hundred ninety-two thousand, three hundred ninety-three".