20710836864 has 160 divisors (see below), whose sum is σ = 64315643040. Its totient is φ = 6603379200.

The previous prime is 20710836859. The next prime is 20710836869. The reversal of 20710836864 is 46863801702.

It is an interprime number because it is at equal distance from previous prime (20710836859) and next prime (20710836869).

It is not an unprimeable number, because it can be changed into a prime (20710836869) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 195039 + ... + 281889.

It is an arithmetic number, because the mean of its divisors is an integer number (401972769).

Almost surely, 2^20710836864 is an apocalyptic number.

20710836864 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 20710836864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32157821520).

20710836864 is an abundant number, since it is smaller than the sum of its proper divisors (43604806176).

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

20710836864 is an equidigital number, since it uses as much as digits as its factorization.

20710836864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86900 (or 86879 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 20710836864 in words is "twenty billion, seven hundred ten million, eight hundred thirty-six thousand, eight hundred sixty-four".