20287102564 has 12 divisors (see below), whose sum is σ = 36104166000. Its totient is φ = 9971626568.

The previous prime is 20287102531. The next prime is 20287102567. The reversal of 20287102564 is 46520178202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20287102567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42980914 + ... + 42981385.

It is an arithmetic number, because the mean of its divisors is an integer number (3008680500).

Almost surely, 2^20287102564 is an apocalyptic number.

It is an amenable number.

20287102564 is a deficient number, since it is larger than the sum of its proper divisors (15817063436).

20287102564 is a wasteful number, since it uses less digits than its factorization.

20287102564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85962362 (or 85962360 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The spelling of 20287102564 in words is "twenty billion, two hundred eighty-seven million, one hundred two thousand, five hundred sixty-four".