20111650656 has 48 divisors (see below), whose sum is σ = 52807286448. Its totient is φ = 6702080000.

The previous prime is 20111650633. The next prime is 20111650673. The reversal of 20111650656 is 65605611102.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357916 + ... + 410276.

It is an arithmetic number, because the mean of its divisors is an integer number (1100151801).

Almost surely, 2^20111650656 is an apocalyptic number.

It is an amenable number.

20111650656 is an abundant number, since it is smaller than the sum of its proper divisors (32695635792).

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

20111650656 is a wasteful number, since it uses less digits than its factorization.

20111650656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56375 (or 56367 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 20111650656 in words is "twenty billion, one hundred eleven million, six hundred fifty thousand, six hundred fifty-six".