20286028388 has 12 divisors (see below), whose sum is σ = 35504011452. Its totient is φ = 10142025120.

The previous prime is 20286028331. The next prime is 20286028393. The reversal of 20286028388 is 88382068202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8237014564 + 12049013824 = 90758^2 + 109768^2 .

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, 200123 + ... + 283938.

It is an arithmetic number, because the mean of its divisors is an integer number (2958667621).

Almost surely, 2^20286028388 is an apocalyptic number.

It is an amenable number.

20286028388 is a deficient number, since it is larger than the sum of its proper divisors (15217983064).

20286028388 is a wasteful number, since it uses less digits than its factorization.

20286028388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494542 (or 494540 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 47.

The spelling of 20286028388 in words is "twenty billion, two hundred eighty-six million, twenty-eight thousand, three hundred eighty-eight".