19805882412 has 12 divisors (see below), whose sum is σ = 46213725656. Its totient is φ = 6601960800.

The previous prime is 19805882399. The next prime is 19805882413. The reversal of 19805882412 is 21428850891.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (19805882413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 825245089 + ... + 825245112.

Almost surely, 2^19805882412 is an apocalyptic number.

19805882412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19805882412 is an abundant number, since it is smaller than the sum of its proper divisors (26407843244).

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

19805882412 is a wasteful number, since it uses less digits than its factorization.

19805882412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650490208 (or 1650490206 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 48.

The spelling of 19805882412 in words is "nineteen billion, eight hundred five million, eight hundred eighty-two thousand, four hundred twelve".