19489794134 has 4 divisors (see below), whose sum is σ = 29234691204. Its totient is φ = 9744897066.

The previous prime is 19489794089. The next prime is 19489794157. The reversal of 19489794134 is 43149798491.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4872448532 + ... + 4872448535.

It is an arithmetic number, because the mean of its divisors is an integer number (7308672801).

Almost surely, 2^19489794134 is an apocalyptic number.

19489794134 is a deficient number, since it is larger than the sum of its proper divisors (9744897070).

19489794134 is an equidigital number, since it uses as much as digits as its factorization.

19489794134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9744897069.

The product of its digits is 7838208, while the sum is 59.

The spelling of 19489794134 in words is "nineteen billion, four hundred eighty-nine million, seven hundred ninety-four thousand, one hundred thirty-four".