20502791876 has 18 divisors (see below), whose sum is σ = 41737826718. Its totient is φ = 8786910720.

The previous prime is 20502791857. The next prime is 20502791891. The reversal of 20502791876 is 67819720502.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15233483776 + 5269308100 = 123424^2 + 72590^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20502791876.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52302845 + ... + 52303236.

It is an arithmetic number, because the mean of its divisors is an integer number (2318768151).

Almost surely, 2^20502791876 is an apocalyptic number.

It is an amenable number.

20502791876 is an abundant number, since it is smaller than the sum of its proper divisors (21235034842).

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

20502791876 is a wasteful number, since it uses less digits than its factorization.

20502791876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104606099 (or 104606090 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 20502791876 in words is "twenty billion, five hundred two million, seven hundred ninety-one thousand, eight hundred seventy-six".