19689394476512 has 24 divisors (see below), whose sum is σ = 38776369525992. Its totient is φ = 9841427612800.

The previous prime is 19689394476497. The next prime is 19689394476527. The reversal of 19689394476512 is 21567449398691.

It is an interprime number because it is at equal distance from previous prime (19689394476497) and next prime (19689394476527).

It is a super-2 number, since 2×19689394476512² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19689394476512.

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, 102077939 + ... + 102270642.

It is an arithmetic number, because the mean of its divisors is an integer number (1615682063583).

Almost surely, 2^{19689394476512} is an apocalyptic number.

It is an amenable number.

19689394476512 is a deficient number, since it is larger than the sum of its proper divisors (19086975049480).

19689394476512 is a wasteful number, since it uses less digits than its factorization.

19689394476512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204351602 (or 204351594 counting only the distinct ones).

The product of its digits is 705438720, while the sum is 74.

The spelling of 19689394476512 in words is "nineteen trillion, six hundred eighty-nine billion, three hundred ninety-four million, four hundred seventy-six thousand, five hundred twelve".