20994873696 has 72 divisors (see below), whose sum is σ = 59747294880. Its totient is φ = 6993236736.

The previous prime is 20994873689. The next prime is 20994873763. The reversal of 20994873696 is 69637849902.

20994873696 is a `hidden beast` number, since 2 + 0 + 99 + 487 + 3 + 69 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 384210 + ... + 435438.

It is an arithmetic number, because the mean of its divisors is an integer number (829823540).

Almost surely, 2^20994873696 is an apocalyptic number.

It is an amenable number.

20994873696 is an abundant number, since it is smaller than the sum of its proper divisors (38752421184).

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

20994873696 is a wasteful number, since it uses less digits than its factorization.

20994873696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52668 (or 52657 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 63.

The spelling of 20994873696 in words is "twenty billion, nine hundred ninety-four million, eight hundred seventy-three thousand, six hundred ninety-six".