19206045917773 has 72 divisors (see below), whose sum is σ = 23151132184320. Its totient is φ = 15912323856000.

The previous prime is 19206045917767. The next prime is 19206045917783. The reversal of 19206045917773 is 37771954060291.

It is a de Polignac number, because none of the positive numbers 2^k-19206045917773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19206045917713) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 741447340 + ... + 741473242.

It is an arithmetic number, because the mean of its divisors is an integer number (321543502560).

Almost surely, 2^{19206045917773} is an apocalyptic number.

19206045917773 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19206045917773 is a deficient number, since it is larger than the sum of its proper divisors (3945086266547).

19206045917773 is a wasteful number, since it uses less digits than its factorization.

19206045917773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26411 (or 26387 counting only the distinct ones).

The product of its (nonzero) digits is 20003760, while the sum is 61.

The spelling of 19206045917773 in words is "nineteen trillion, two hundred six billion, forty-five million, nine hundred seventeen thousand, seven hundred seventy-three".