19497933226 has 8 divisors (see below), whose sum is σ = 29310343524. Its totient is φ = 9727818720.

The previous prime is 19497933163. The next prime is 19497933229. The reversal of 19497933226 is 62233979491.

It is a Cunningham number, because it is equal to 139635²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 19497933225 + 1 = 139635^2 + 1^2 .

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

It is not an unprimeable number, because it can be changed into a prime (19497933229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10572795 + ... + 10574638.

Almost surely, 2^19497933226 is an apocalyptic number.

19497933226 is a deficient number, since it is larger than the sum of its proper divisors (9812410298).

19497933226 is a wasteful number, since it uses less digits than its factorization.

19497933226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21147896.

The product of its digits is 4408992, while the sum is 55.

The spelling of 19497933226 in words is "nineteen billion, four hundred ninety-seven million, nine hundred thirty-three thousand, two hundred twenty-six".