19504946197 has 8 divisors (see below), whose sum is σ = 22203259200. Its totient is φ = 16960822560.

The previous prime is 19504946191. The next prime is 19504946221. The reversal of 19504946197 is 79164940591.

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

It is not a de Polignac number, because 19504946197 - 2²³ = 19496557589 is a prime.

It is a super-2 number, since 2×19504946197² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19504946191) 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, 38547072 + ... + 38547577.

It is an arithmetic number, because the mean of its divisors is an integer number (2775407400).

Almost surely, 2^19504946197 is an apocalyptic number.

It is an amenable number.

19504946197 is a deficient number, since it is larger than the sum of its proper divisors (2698313003).

19504946197 is a wasteful number, since it uses less digits than its factorization.

19504946197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77094683.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 19504946197 in words is "nineteen billion, five hundred four million, nine hundred forty-six thousand, one hundred ninety-seven".