19964171412 has 36 divisors (see below), whose sum is σ = 52334065056. Its totient is φ = 6654723480.

The previous prime is 19964171407. The next prime is 19964171429. The reversal of 19964171412 is 21417146991.

19964171412 is a `hidden beast` number, since 1 + 9 + 9 + 64 + 171 + 412 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10268664 + ... + 10270607.

Almost surely, 2^19964171412 is an apocalyptic number.

19964171412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19964171412 is an abundant number, since it is smaller than the sum of its proper divisors (32369893644).

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

19964171412 is a wasteful number, since it uses less digits than its factorization.

19964171412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20539290 (or 20539276 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The spelling of 19964171412 in words is "nineteen billion, nine hundred sixty-four million, one hundred seventy-one thousand, four hundred twelve".