19447477661573 has 48 divisors (see below), whose sum is σ = 22741808044032. Its totient is φ = 16588099008000.

The previous prime is 19447477661537. The next prime is 19447477661617. The reversal of 19447477661573 is 37516677474491.

It is not a de Polignac number, because 19447477661573 - 2¹⁰ = 19447477660549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19447477661497 and 19447477661506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19447477661503) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9132383 + ... + 11058723.

It is an arithmetic number, because the mean of its divisors is an integer number (473787667584).

Almost surely, 2^{19447477661573} is an apocalyptic number.

19447477661573 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19447477661573 is a deficient number, since it is larger than the sum of its proper divisors (3294330382459).

19447477661573 is a wasteful number, since it uses less digits than its factorization.

19447477661573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926486 (or 1926473 counting only the distinct ones).

The product of its digits is 746807040, while the sum is 71.

The spelling of 19447477661573 in words is "nineteen trillion, four hundred forty-seven billion, four hundred seventy-seven million, six hundred sixty-one thousand, five hundred seventy-three".