20996648001 has 24 divisors (see below), whose sum is σ = 35597924544. Its totient is φ = 11673810720.

The previous prime is 20996647967. The next prime is 20996648009. The reversal of 20996648001 is 10084669902.

It is a happy number.

20996648001 is a `hidden beast` number, since 20 + 99 + 66 + 480 + 0 + 1 = 666.

It is not a de Polignac number, because 20996648001 - 2²⁷ = 20862430273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20996648009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4501455 + ... + 4506116.

It is an arithmetic number, because the mean of its divisors is an integer number (1483246856).

Almost surely, 2^20996648001 is an apocalyptic number.

20996648001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20996648001 is a deficient number, since it is larger than the sum of its proper divisors (14601276543).

20996648001 is a wasteful number, since it uses less digits than its factorization.

20996648001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9007621 (or 9007618 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 20996648001 in words is "twenty billion, nine hundred ninety-six million, six hundred forty-eight thousand, one".