20011969152 has 576 divisors, whose sum is σ = 72428029440.
Its totient is φ = 5188976640.
The previous prime is 20011969151. The next prime is 20011969157. The reversal of 20011969152 is 25196911002.
It is a tau number, because it is divible by the number of its divisors (576).
It is a Harshad number since it is a multiple of its sum of digits (36).
It is not an unprimeable number, because it can be changed into a prime (20011969151) by changing a digit.
It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 72245238 + ... + 72245514.
Almost surely, 220011969152 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 20011969152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36214014720).
20011969152 is an abundant number, since it is smaller than the sum of its proper divisors (52416060288).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
20011969152 is a wasteful number, since it uses less digits than its factorization.
20011969152 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 369 (or 337 counting only the distinct ones).
The product of its (nonzero) digits is 9720, while the sum is 36.
The spelling of 20011969152 in words is "twenty billion, eleven million, nine hundred sixty-nine thousand, one hundred fifty-two".