20900716704 has 144 divisors (see below), whose sum is σ = 68045769792. Its totient is φ = 5961222144.

The previous prime is 20900716679. The next prime is 20900716721. The reversal of 20900716704 is 40761700902.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1186747 + ... + 1204229.

It is an arithmetic number, because the mean of its divisors is an integer number (472540068).

Almost surely, 2^20900716704 is an apocalyptic number.

20900716704 is a gapful number since it is divisible by the number (24) 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 20900716704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34022884896).

20900716704 is an abundant number, since it is smaller than the sum of its proper divisors (47145053088).

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

20900716704 is a wasteful number, since it uses less digits than its factorization.

20900716704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18099 (or 18088 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The spelling of 20900716704 in words is "twenty billion, nine hundred million, seven hundred sixteen thousand, seven hundred four".