20199489197 has 8 divisors (see below), whose sum is σ = 20262506880. Its totient is φ = 20136504960.

The previous prime is 20199489181. The next prime is 20199489227. The reversal of 20199489197 is 79198499102.

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 20199489197 - 2⁴ = 20199489181 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 (20199489127) 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, 1780172 + ... + 1791482.

It is an arithmetic number, because the mean of its divisors is an integer number (2532813360).

Almost surely, 2^20199489197 is an apocalyptic number.

It is an amenable number.

20199489197 is a deficient number, since it is larger than the sum of its proper divisors (63017683).

20199489197 is a wasteful number, since it uses less digits than its factorization.

20199489197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16723.

The product of its (nonzero) digits is 2939328, while the sum is 59.

The spelling of 20199489197 in words is "twenty billion, one hundred ninety-nine million, four hundred eighty-nine thousand, one hundred ninety-seven".