20950887988 has 36 divisors (see below), whose sum is σ = 37760771776. Its totient is φ = 10170820800.

The previous prime is 20950887901. The next prime is 20950887989. The reversal of 20950887988 is 88978805902.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20950887989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1411381 + ... + 1426147.

Almost surely, 2^20950887988 is an apocalyptic number.

It is an amenable number.

20950887988 is a deficient number, since it is larger than the sum of its proper divisors (16809883788).

20950887988 is a wasteful number, since it uses less digits than its factorization.

20950887988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15064 (or 15021 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 64.

The spelling of 20950887988 in words is "twenty billion, nine hundred fifty million, eight hundred eighty-seven thousand, nine hundred eighty-eight".