19889999066 has 16 divisors (see below), whose sum is σ = 34104915456. Its totient is φ = 8522341776.

The previous prime is 19889999047. The next prime is 19889999081. The reversal of 19889999066 is 66099998891.

It is a super-2 number, since 2×19889999066² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19889998984 and 19889999002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97481 + ... + 221996.

It is an arithmetic number, because the mean of its divisors is an integer number (2131557216).

Almost surely, 2^19889999066 is an apocalyptic number.

19889999066 is a deficient number, since it is larger than the sum of its proper divisors (14214916390).

19889999066 is a wasteful number, since it uses less digits than its factorization.

19889999066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323933.

The product of its (nonzero) digits is 136048896, while the sum is 74.

The spelling of 19889999066 in words is "nineteen billion, eight hundred eighty-nine million, nine hundred ninety-nine thousand, sixty-six".