19726920061 has 8 divisors (see below), whose sum is σ = 19756874880. Its totient is φ = 19696989312.

The previous prime is 19726920049. The next prime is 19726920089. The reversal of 19726920061 is 16002962791.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19726920061 - 2⁹ = 19726919549 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 (19726920001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2204845 + ... + 2213773.

It is an arithmetic number, because the mean of its divisors is an integer number (2469609360).

Almost surely, 2^19726920061 is an apocalyptic number.

It is an amenable number.

19726920061 is a deficient number, since it is larger than the sum of its proper divisors (29954819).

19726920061 is a wasteful number, since it uses less digits than its factorization.

19726920061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12035.

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 19726920061 in words is "nineteen billion, seven hundred twenty-six million, nine hundred twenty thousand, sixty-one".