20700864912 has 320 divisors, whose sum is σ = 72100385280. Its totient is φ = 4960714752.

The previous prime is 20700864893. The next prime is 20700864937. The reversal of 20700864912 is 21946800702.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 2148618 + ... + 2158230.

It is an arithmetic number, because the mean of its divisors is an integer number (225313704).

Almost surely, 2^20700864912 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 20700864912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36050192640).

20700864912 is an abundant number, since it is smaller than the sum of its proper divisors (51399520368).

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

20700864912 is a wasteful number, since it uses less digits than its factorization.

20700864912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9690 (or 9684 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 20700864912 in words is "twenty billion, seven hundred million, eight hundred sixty-four thousand, nine hundred twelve".