19489021851004 has 12 divisors (see below), whose sum is σ = 34105836381624. Its totient is φ = 9744497170544.

The previous prime is 19489021850957. The next prime is 19489021851041. The reversal of 19489021851004 is 40015812098491.

It is a super-2 number, since 2×19489021851004² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170022 + ... + 6245554.

It is an arithmetic number, because the mean of its divisors is an integer number (2842153031802).

Almost surely, 2^{19489021851004} is an apocalyptic number.

It is an amenable number.

19489021851004 is a deficient number, since it is larger than the sum of its proper divisors (14616814530620).

19489021851004 is a wasteful number, since it uses less digits than its factorization.

19489021851004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6877484 (or 6877482 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 52.

The spelling of 19489021851004 in words is "nineteen trillion, four hundred eighty-nine billion, twenty-one million, eight hundred fifty-one thousand, four".