20915712000 has 832 divisors, whose sum is σ = 82801180800. Its totient is φ = 5190451200.

The previous prime is 20915711989. The next prime is 20915712007. The reversal of 20915712000 is 21751902.

20915712000 is a `hidden beast` number, since 2 + 0 + 91 + 571 + 2 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20915712007) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 235007956 + ... + 235008044.

It is an arithmetic number, because the mean of its divisors is an integer number (99520650).

Almost surely, 2^20915712000 is an apocalyptic number.

20915712000 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 20915712000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41400590400).

20915712000 is an abundant number, since it is smaller than the sum of its proper divisors (61885468800).

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

20915712000 is an equidigital number, since it uses as much as digits as its factorization.

20915712000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The spelling of 20915712000 in words is "twenty billion, nine hundred fifteen million, seven hundred twelve thousand".