20285876788 has 12 divisors (see below), whose sum is σ = 35509902372. Its totient is φ = 10140190400.

The previous prime is 20285876771. The next prime is 20285876791. The reversal of 20285876788 is 88767858202.

It can be written as a sum of positive squares in 2 ways, for example, as 8909094544 + 11376782244 = 94388^2 + 106662^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 670345 + ... + 699952.

It is an arithmetic number, because the mean of its divisors is an integer number (2959158531).

Almost surely, 2^20285876788 is an apocalyptic number.

It is an amenable number.

20285876788 is a deficient number, since it is larger than the sum of its proper divisors (15224025584).

20285876788 is a wasteful number, since it uses less digits than its factorization.

20285876788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374002 (or 1374000 counting only the distinct ones).

The product of its (nonzero) digits is 24084480, while the sum is 61.

The spelling of 20285876788 in words is "twenty billion, two hundred eighty-five million, eight hundred seventy-six thousand, seven hundred eighty-eight".