20489989722000 has 320 divisors, whose sum is σ = 68333322220800. Its totient is φ = 5278066790400.

The previous prime is 20489989721987. The next prime is 20489989722143. The reversal of 20489989722000 is 22798998402.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30525996 + ... + 31190004.

It is an arithmetic number, because the mean of its divisors is an integer number (213541631940).

Almost surely, 2^{20489989722000} is an apocalyptic number.

20489989722000 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 20489989722000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34166661110400).

20489989722000 is an abundant number, since it is smaller than the sum of its proper divisors (47843332498800).

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

20489989722000 is a wasteful number, since it uses less digits than its factorization.

20489989722000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664211 (or 664195 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 60.

The spelling of 20489989722000 in words is "twenty trillion, four hundred eighty-nine billion, nine hundred eighty-nine million, seven hundred twenty-two thousand".