20996055653472 has 144 divisors (see below), whose sum is σ = 59762444021280. Its totient is φ = 6992251693056.

The previous prime is 20996055653411. The next prime is 20996055653497. The reversal of 20996055653472 is 27435655069902.

It is a happy number.

20996055653472 is a `hidden beast` number, since 2 + 0 + 9 + 9 + 6 + 0 + 556 + 5 + 3 + 4 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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 23 ways as a sum of consecutive naturals, for example, 2894806198 + ... + 2894813450.

It is an arithmetic number, because the mean of its divisors is an integer number (415016972370).

Almost surely, 2^{20996055653472} is an apocalyptic number.

It is an amenable number.

20996055653472 is an abundant number, since it is smaller than the sum of its proper divisors (38766388367808).

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

20996055653472 is a wasteful number, since it uses less digits than its factorization.

20996055653472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15125 (or 15114 counting only the distinct ones).

The product of its (nonzero) digits is 122472000, while the sum is 63.

The spelling of 20996055653472 in words is "twenty trillion, nine hundred ninety-six billion, fifty-five million, six hundred fifty-three thousand, four hundred seventy-two".