20657848284 has 120 divisors (see below), whose sum is σ = 56022951600. Its totient is φ = 6629817600.

The previous prime is 20657848271. The next prime is 20657848297. The reversal of 20657848284 is 48284875602.

20657848284 is a `hidden beast` number, since 2 + 0 + 6 + 578 + 48 + 28 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (20657848271) and next prime (20657848297).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 20657848284.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3558184 + ... + 3563984.

It is an arithmetic number, because the mean of its divisors is an integer number (466857930).

Almost surely, 2^20657848284 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 20657848284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28011475800).

20657848284 is an abundant number, since it is smaller than the sum of its proper divisors (35365103316).

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

20657848284 is a wasteful number, since it uses less digits than its factorization.

20657848284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6225 (or 6214 counting only the distinct ones).

The product of its (nonzero) digits is 6881280, while the sum is 54.

The spelling of 20657848284 in words is "twenty billion, six hundred fifty-seven million, eight hundred forty-eight thousand, two hundred eighty-four".