20107845552 has 20 divisors (see below), whose sum is σ = 51945267800. Its totient is φ = 6702615168.

The previous prime is 20107845539. The next prime is 20107845557. The reversal of 20107845552 is 25554870102.

It is a self number, because there is not a number n which added to its sum of digits gives 20107845552.

It is not an unprimeable number, because it can be changed into a prime (20107845557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209456677 + ... + 209456772.

It is an arithmetic number, because the mean of its divisors is an integer number (2597263390).

Almost surely, 2^20107845552 is an apocalyptic number.

It is an amenable number.

20107845552 is an abundant number, since it is smaller than the sum of its proper divisors (31837422248).

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

20107845552 is a wasteful number, since it uses less digits than its factorization.

20107845552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418913460 (or 418913454 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 39.

The spelling of 20107845552 in words is "twenty billion, one hundred seven million, eight hundred forty-five thousand, five hundred fifty-two".