19099064434 has 4 divisors (see below), whose sum is σ = 28648596654. Its totient is φ = 9549532216.

The previous prime is 19099064429. The next prime is 19099064459. The reversal of 19099064434 is 43446099091.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15413967409 + 3685097025 = 124153^2 + 60705^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4774766107 + ... + 4774766110.

Almost surely, 2^19099064434 is an apocalyptic number.

19099064434 is a deficient number, since it is larger than the sum of its proper divisors (9549532220).

19099064434 is an equidigital number, since it uses as much as digits as its factorization.

19099064434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9549532219.

The product of its (nonzero) digits is 839808, while the sum is 49.

The spelling of 19099064434 in words is "nineteen billion, ninety-nine million, sixty-four thousand, four hundred thirty-four".