20857483008 has 216 divisors, whose sum is σ = 62977234320. Its totient is φ = 6630113280.

The previous prime is 20857482983. The next prime is 20857483013. The reversal of 20857483008 is 80038475802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5543848 + ... + 5547608.

It is an arithmetic number, because the mean of its divisors is an integer number (291561270).

Almost surely, 2^20857483008 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 20857483008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31488617160).

20857483008 is an abundant number, since it is smaller than the sum of its proper divisors (42119751312).

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

20857483008 is a wasteful number, since it uses less digits than its factorization.

20857483008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3895 (or 3878 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The spelling of 20857483008 in words is "twenty billion, eight hundred fifty-seven million, four hundred eighty-three thousand, eight".