19692180557 has 8 divisors (see below), whose sum is σ = 22723848576. Its totient is φ = 16715137392.

The previous prime is 19692180553. The next prime is 19692180569. The reversal of 19692180557 is 75508129691.

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 19692180557 - 2² = 19692180553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19692180499 and 19692180508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19692180553) 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 7 ways as a sum of consecutive naturals, for example, 13655438 + ... + 13656879.

It is an arithmetic number, because the mean of its divisors is an integer number (2840481072).

Almost surely, 2^19692180557 is an apocalyptic number.

It is an amenable number.

19692180557 is a deficient number, since it is larger than the sum of its proper divisors (3031668019).

19692180557 is a wasteful number, since it uses less digits than its factorization.

19692180557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27312427.

The product of its (nonzero) digits is 1360800, while the sum is 53.

The spelling of 19692180557 in words is "nineteen billion, six hundred ninety-two million, one hundred eighty thousand, five hundred fifty-seven".