19498549197 has 16 divisors (see below), whose sum is σ = 26294051520. Its totient is φ = 12851779200.

The previous prime is 19498549193. The next prime is 19498549199. The reversal of 19498549197 is 79194589491.

It is a happy number.

It is not a de Polignac number, because 19498549197 - 2² = 19498549193 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19498549193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13497 + ... + 197937.

It is an arithmetic number, because the mean of its divisors is an integer number (1643378220).

Almost surely, 2^19498549197 is an apocalyptic number.

It is an amenable number.

19498549197 is a deficient number, since it is larger than the sum of its proper divisors (6795502323).

19498549197 is a wasteful number, since it uses less digits than its factorization.

19498549197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184844.

The product of its digits is 29393280, while the sum is 66.

The spelling of 19498549197 in words is "nineteen billion, four hundred ninety-eight million, five hundred forty-nine thousand, one hundred ninety-seven".