19820812892 has 12 divisors (see below), whose sum is σ = 34687471896. Its totient is φ = 9910106640.

The previous prime is 19820812883. The next prime is 19820812897. The reversal of 19820812892 is 29821802891.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 19820812892.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19820812897) 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, 146498 + ... + 247190.

It is an arithmetic number, because the mean of its divisors is an integer number (2890622658).

Almost surely, 2^19820812892 is an apocalyptic number.

It is an amenable number.

19820812892 is a deficient number, since it is larger than the sum of its proper divisors (14866659004).

19820812892 is a wasteful number, since it uses less digits than its factorization.

19820812892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149908 (or 149906 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 50.

The spelling of 19820812892 in words is "nineteen billion, eight hundred twenty million, eight hundred twelve thousand, eight hundred ninety-two".