19692134891 has 16 divisors (see below), whose sum is σ = 23254717920. Its totient is φ = 16439224320.

The previous prime is 19692134881. The next prime is 19692134899. The reversal of 19692134891 is 19843129691.

It is a cyclic number.

It is not a de Polignac number, because 19692134891 - 2²⁶ = 19625026027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19692134899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329156 + ... + 384353.

It is an arithmetic number, because the mean of its divisors is an integer number (1453419870).

Almost surely, 2^19692134891 is an apocalyptic number.

19692134891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19692134891 is a deficient number, since it is larger than the sum of its proper divisors (3562583029).

19692134891 is a wasteful number, since it uses less digits than its factorization.

19692134891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713726.

The product of its digits is 839808, while the sum is 53.

The spelling of 19692134891 in words is "nineteen billion, six hundred ninety-two million, one hundred thirty-four thousand, eight hundred ninety-one".