20051802884 has 24 divisors (see below), whose sum is σ = 35598500280. Its totient is φ = 9881524224.

The previous prime is 20051802857. The next prime is 20051802907. The reversal of 20051802884 is 48820815002.

It can be written as a sum of positive squares in 4 ways, for example, as 724686400 + 19327116484 = 26920^2 + 139022^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21452 + ... + 201404.

It is an arithmetic number, because the mean of its divisors is an integer number (1483270845).

Almost surely, 2^20051802884 is an apocalyptic number.

It is an amenable number.

20051802884 is a deficient number, since it is larger than the sum of its proper divisors (15546697396).

20051802884 is a wasteful number, since it uses less digits than its factorization.

20051802884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180359 (or 180357 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 38.

The spelling of 20051802884 in words is "twenty billion, fifty-one million, eight hundred two thousand, eight hundred eighty-four".