19097229947 has 4 divisors (see below), whose sum is σ = 19129112400. Its totient is φ = 19065347496.

The previous prime is 19097229941. The next prime is 19097229967. The reversal of 19097229947 is 74992279091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74992279091 = 2699 ⋅27785209.

It is a cyclic number.

It is not a de Polignac number, because 19097229947 - 2²⁴ = 19080452731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19097229941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15940328 + ... + 15941525.

It is an arithmetic number, because the mean of its divisors is an integer number (4782278100).

Almost surely, 2^19097229947 is an apocalyptic number.

19097229947 is a deficient number, since it is larger than the sum of its proper divisors (31882453).

19097229947 is an equidigital number, since it uses as much as digits as its factorization.

19097229947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31882452.

The product of its (nonzero) digits is 5143824, while the sum is 59.

The spelling of 19097229947 in words is "nineteen billion, ninety-seven million, two hundred twenty-nine thousand, nine hundred forty-seven".