20616012646 has 16 divisors (see below), whose sum is σ = 31973701248. Its totient is φ = 9959198400.

The previous prime is 20616012611. The next prime is 20616012667. The reversal of 20616012646 is 64621061602.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 233215 + ... + 309226.

It is an arithmetic number, because the mean of its divisors is an integer number (1998356328).

Almost surely, 2^20616012646 is an apocalyptic number.

20616012646 is a deficient number, since it is larger than the sum of its proper divisors (11357688602).

20616012646 is a wasteful number, since it uses less digits than its factorization.

20616012646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543087.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 20616012646 in words is "twenty billion, six hundred sixteen million, twelve thousand, six hundred forty-six".