19266794491872 has 96 divisors (see below), whose sum is σ = 51988500369792. Its totient is φ = 6243124529664.

The previous prime is 19266794491849. The next prime is 19266794491933. The reversal of 19266794491872 is 27819449766291.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 19266794491794 and 19266794491803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1573843 + ... + 6403949.

It is an arithmetic number, because the mean of its divisors is an integer number (541546878852).

Almost surely, 2^{19266794491872} is an apocalyptic number.

19266794491872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19266794491872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25994250184896).

19266794491872 is an abundant number, since it is smaller than the sum of its proper divisors (32721705877920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19266794491872 is a wasteful number, since it uses less digits than its factorization.

19266794491872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4831280 (or 4831272 counting only the distinct ones).

The product of its digits is 658409472, while the sum is 75.

The spelling of 19266794491872 in words is "nineteen trillion, two hundred sixty-six billion, seven hundred ninety-four million, four hundred ninety-one thousand, eight hundred seventy-two".