20984757184 has 28 divisors (see below), whose sum is σ = 41647916704. Its totient is φ = 10490793984.

The previous prime is 20984757179. The next prime is 20984757223. The reversal of 20984757184 is 48175748902.

It is a congruent number.

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, 483049 + ... + 524695.

Almost surely, 2^20984757184 is an apocalyptic number.

It is an amenable number.

20984757184 is a deficient number, since it is larger than the sum of its proper divisors (20663159520).

20984757184 is an equidigital number, since it uses as much as digits as its factorization.

20984757184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49532 (or 49522 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 20984757184 in words is "twenty billion, nine hundred eighty-four million, seven hundred fifty-seven thousand, one hundred eighty-four".