12923891992 has 64 divisors (see below), whose sum is σ = 27422128800. Its totient is φ = 5656304640.

The previous prime is 12923891987. The next prime is 12923891993. The reversal of 12923891992 is 29919832921.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12923891993) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 945108 + ... + 958684.

Almost surely, 2^12923891992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12923891992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13711064400).

12923891992 is an abundant number, since it is smaller than the sum of its proper divisors (14498236808).

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

12923891992 is a wasteful number, since it uses less digits than its factorization.

12923891992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13996 (or 13992 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 55.

The spelling of 12923891992 in words is "twelve billion, nine hundred twenty-three million, eight hundred ninety-one thousand, nine hundred ninety-two".