20784702912 has 112 divisors (see below), whose sum is σ = 56772291840. Its totient is φ = 6706925568.

The previous prime is 20784702907. The next prime is 20784702919. The reversal of 20784702912 is 21920748702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20784702919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 921789 + ... + 944067.

Almost surely, 2^20784702912 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 20784702912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28386145920).

20784702912 is an abundant number, since it is smaller than the sum of its proper divisors (35987588928).

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

20784702912 is a wasteful number, since it uses less digits than its factorization.

20784702912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22450 (or 22440 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The spelling of 20784702912 in words is "twenty billion, seven hundred eighty-four million, seven hundred two thousand, nine hundred twelve".