20842851960 has 320 divisors, whose sum is σ = 81166219200. Its totient is φ = 4698445824.

The previous prime is 20842851929. The next prime is 20842851977. The reversal of 20842851960 is 6915824802.

20842851960 is a `hidden beast` number, since 208 + 428 + 5 + 19 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1649346 + ... + 1661934.

It is an arithmetic number, because the mean of its divisors is an integer number (253644435).

Almost surely, 2^20842851960 is an apocalyptic number.

20842851960 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 20842851960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40583109600).

20842851960 is an abundant number, since it is smaller than the sum of its proper divisors (60323367240).

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

20842851960 is a wasteful number, since it uses less digits than its factorization.

20842851960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12692 (or 12679 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 20842851960 in words is "twenty billion, eight hundred forty-two million, eight hundred fifty-one thousand, nine hundred sixty".