20786507852 has 48 divisors (see below), whose sum is σ = 42489891360. Its totient is φ = 8792678400.

The previous prime is 20786507849. The next prime is 20786507881. The reversal of 20786507852 is 25870568702.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20786507852.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89549 + ... + 222692.

It is an arithmetic number, because the mean of its divisors is an integer number (885206070).

Almost surely, 2^20786507852 is an apocalyptic number.

20786507852 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20786507852 is an abundant number, since it is smaller than the sum of its proper divisors (21703383508).

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

20786507852 is a wasteful number, since it uses less digits than its factorization.

20786507852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312362 (or 312360 counting only the distinct ones).

The product of its (nonzero) digits is 1881600, while the sum is 50.

The spelling of 20786507852 in words is "twenty billion, seven hundred eighty-six million, five hundred seven thousand, eight hundred fifty-two".