19932702191 has 4 divisors (see below), whose sum is σ = 20981791800. Its totient is φ = 18883612584.

The previous prime is 19932702169. The next prime is 19932702217. The reversal of 19932702191 is 19120723991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19932702191 - 2²² = 19928507887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19932702161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524544776 + ... + 524544813.

It is an arithmetic number, because the mean of its divisors is an integer number (5245447950).

Almost surely, 2^19932702191 is an apocalyptic number.

19932702191 is a deficient number, since it is larger than the sum of its proper divisors (1049089609).

19932702191 is a wasteful number, since it uses less digits than its factorization.

19932702191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049089608.

The product of its (nonzero) digits is 61236, while the sum is 44.

The spelling of 19932702191 in words is "nineteen billion, nine hundred thirty-two million, seven hundred two thousand, one hundred ninety-one".