20988986750 has 64 divisors (see below), whose sum is σ = 40333864896. Its totient is φ = 8175600000.

The previous prime is 20988986749. The next prime is 20988986867. The reversal of 20988986750 is 5768988902.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1533437 + ... + 1547063.

It is an arithmetic number, because the mean of its divisors is an integer number (630216639).

Almost surely, 2^20988986750 is an apocalyptic number.

20988986750 is a deficient number, since it is larger than the sum of its proper divisors (19344878146).

20988986750 is a wasteful number, since it uses less digits than its factorization.

20988986750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13806 (or 13796 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 62.

The spelling of 20988986750 in words is "twenty billion, nine hundred eighty-eight million, nine hundred eighty-six thousand, seven hundred fifty".