20853652560 has 160 divisors (see below), whose sum is σ = 69718537728. Its totient is φ = 5125877760.

The previous prime is 20853652553. The next prime is 20853652571. The reversal of 20853652560 is 6525635802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2369929 + ... + 2378711.

Almost surely, 2^20853652560 is an apocalyptic number.

20853652560 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 20853652560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34859268864).

20853652560 is an abundant number, since it is smaller than the sum of its proper divisors (48864885168).

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

20853652560 is a wasteful number, since it uses less digits than its factorization.

20853652560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9573 (or 9567 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 20853652560 in words is "twenty billion, eight hundred fifty-three million, six hundred fifty-two thousand, five hundred sixty".