20321871192 has 384 divisors, whose sum is σ = 70342963200. Its totient is φ = 5318784000.

The previous prime is 20321871131. The next prime is 20321871203. The reversal of 20321871192 is 29117812302.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16920192 + ... + 16921392.

It is an arithmetic number, because the mean of its divisors is an integer number (183184800).

Almost surely, 2^20321871192 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 20321871192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35171481600).

20321871192 is an abundant number, since it is smaller than the sum of its proper divisors (50021092008).

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

20321871192 is a wasteful number, since it uses less digits than its factorization.

20321871192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292 (or 1263 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 20321871192 in words is "twenty billion, three hundred twenty-one million, eight hundred seventy-one thousand, one hundred ninety-two".