19320513891 has 16 divisors (see below), whose sum is σ = 29490956544. Its totient is φ = 11021478624.

The previous prime is 19320513853. The next prime is 19320513941. The reversal of 19320513891 is 19831502391.

It is not a de Polignac number, because 19320513891 - 2¹¹ = 19320511843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19320513691) 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, 771340 + ... + 795993.

It is an arithmetic number, because the mean of its divisors is an integer number (1843184784).

Almost surely, 2^19320513891 is an apocalyptic number.

19320513891 is a deficient number, since it is larger than the sum of its proper divisors (10170442653).

19320513891 is a wasteful number, since it uses less digits than its factorization.

19320513891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567930.

The product of its (nonzero) digits is 58320, while the sum is 42.

The spelling of 19320513891 in words is "nineteen billion, three hundred twenty million, five hundred thirteen thousand, eight hundred ninety-one".