20919250184 has 32 divisors (see below), whose sum is σ = 44833195200. Its totient is φ = 8964146880.

The previous prime is 20919250169. The next prime is 20919250207. The reversal of 20919250184 is 48105291902.

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 7 ways as a sum of consecutive naturals, for example, 461579 + ... + 504869.

It is an arithmetic number, because the mean of its divisors is an integer number (1401037350).

Almost surely, 2^20919250184 is an apocalyptic number.

It is an amenable number.

20919250184 is an abundant number, since it is smaller than the sum of its proper divisors (23913945016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20919250184 is a wasteful number, since it uses less digits than its factorization.

20919250184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51933 (or 51929 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 20919250184 in words is "twenty billion, nine hundred nineteen million, two hundred fifty thousand, one hundred eighty-four".