20852475870 has 64 divisors (see below), whose sum is σ = 52737511680. Its totient is φ = 5262236928.

The previous prime is 20852475863. The next prime is 20852475899. The reversal of 20852475870 is 7857425802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 514569 + ... + 553611.

It is an arithmetic number, because the mean of its divisors is an integer number (824023620).

Almost surely, 2^20852475870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20852475870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26368755840).

20852475870 is an abundant number, since it is smaller than the sum of its proper divisors (31885035810).

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

20852475870 is a wasteful number, since it uses less digits than its factorization.

20852475870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40009.

The product of its (nonzero) digits is 1254400, while the sum is 48.

The spelling of 20852475870 in words is "twenty billion, eight hundred fifty-two million, four hundred seventy-five thousand, eight hundred seventy".