19447189730969 has 144 divisors (see below), whose sum is σ = 28844266429440. Its totient is φ = 12948171667200.

The previous prime is 19447189730821. The next prime is 19447189730999. The reversal of 19447189730969 is 96903798174491.

It is a happy number.

It is not a de Polignac number, because 19447189730969 - 2²⁴ = 19447172953753 is a prime.

It is a super-2 number, since 2×19447189730969² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (77).

It is a self number, because there is not a number n which added to its sum of digits gives 19447189730969.

It is not an unprimeable number, because it can be changed into a prime (19447189730999) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 54778967 + ... + 55132835.

It is an arithmetic number, because the mean of its divisors is an integer number (200307405760).

Almost surely, 2^{19447189730969} is an apocalyptic number.

It is an amenable number.

19447189730969 is a deficient number, since it is larger than the sum of its proper divisors (9397076698471).

19447189730969 is a wasteful number, since it uses less digits than its factorization.

19447189730969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353972 (or 353954 counting only the distinct ones).

The product of its (nonzero) digits is 740710656, while the sum is 77.

The spelling of 19447189730969 in words is "nineteen trillion, four hundred forty-seven billion, one hundred eighty-nine million, seven hundred thirty thousand, nine hundred sixty-nine".