19906871512 has 32 divisors (see below), whose sum is σ = 41292115200. Its totient is φ = 8921130400.

The previous prime is 19906871483. The next prime is 19906871527. The reversal of 19906871512 is 21517860991.

It is a super-2 number, since 2×19906871512² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1586812 + ... + 1599307.

It is an arithmetic number, because the mean of its divisors is an integer number (1290378600).

Almost surely, 2^19906871512 is an apocalyptic number.

It is an amenable number.

19906871512 is an abundant number, since it is smaller than the sum of its proper divisors (21385243688).

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

19906871512 is a wasteful number, since it uses less digits than its factorization.

19906871512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3186207 (or 3186203 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 49.

The spelling of 19906871512 in words is "nineteen billion, nine hundred six million, eight hundred seventy-one thousand, five hundred twelve".