20159891388000 has 5376 divisors, whose sum is σ = 100050165895680. Its totient is φ = 3869835264000.

The previous prime is 20159891387989. The next prime is 20159891388011. The reversal of 20159891388000 is 88319895102.

20159891388000 is a `hidden beast` number, since 20 + 159 + 8 + 91 + 388 + 0 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (20159891387989) and next prime (20159891388011).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 895 ways as a sum of consecutive naturals, for example, 184953131946 + ... + 184953132054.

It is an arithmetic number, because the mean of its divisors is an integer number (18610521930).

Almost surely, 2^{20159891388000} is an apocalyptic number.

20159891388000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20159891388000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50025082947840).

20159891388000 is an abundant number, since it is smaller than the sum of its proper divisors (79890274507680).

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

20159891388000 is a wasteful number, since it uses less digits than its factorization.

20159891388000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The spelling of 20159891388000 in words is "twenty trillion, one hundred fifty-nine billion, eight hundred ninety-one million, three hundred eighty-eight thousand".