20852492256 has 120 divisors (see below), whose sum is σ = 62631787680. Its totient is φ = 6802900992.

The previous prime is 20852492249. The next prime is 20852492257. The reversal of 20852492256 is 65229425802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20852492257) 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, 36240 + ... + 207408.

It is an arithmetic number, because the mean of its divisors is an integer number (521931564).

Almost surely, 2^20852492256 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 20852492256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31315893840).

20852492256 is an abundant number, since it is smaller than the sum of its proper divisors (41779295424).

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

20852492256 is a wasteful number, since it uses less digits than its factorization.

20852492256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171238 (or 171221 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 20852492256 in words is "twenty billion, eight hundred fifty-two million, four hundred ninety-two thousand, two hundred fifty-six".