20389618364160 has 288 divisors, whose sum is σ = 68585179864320. Its totient is φ = 5148168192000.

The previous prime is 20389618364153. The next prime is 20389618364173. The reversal of 20389618364160 is 6146381698302.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 20389618364160.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131323375 + ... + 131478545.

It is an arithmetic number, because the mean of its divisors is an integer number (238142985640).

Almost surely, 2^{20389618364160} is an apocalyptic number.

20389618364160 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 20389618364160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34292589932160).

20389618364160 is an abundant number, since it is smaller than the sum of its proper divisors (48195561500160).

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

20389618364160 is a wasteful number, since it uses less digits than its factorization.

20389618364160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157015 (or 157001 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 57.

The spelling of 20389618364160 in words is "twenty trillion, three hundred eighty-nine billion, six hundred eighteen million, three hundred sixty-four thousand, one hundred sixty".