20956655288 has 16 divisors (see below), whose sum is σ = 39297552000. Its totient is φ = 10477308096.

The previous prime is 20956655287. The next prime is 20956655299. The reversal of 20956655288 is 88255665902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20956655287) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 36248 + ... + 207911.

It is an arithmetic number, because the mean of its divisors is an integer number (2456097000).

Almost surely, 2^20956655288 is an apocalyptic number.

It is an amenable number.

20956655288 is a deficient number, since it is larger than the sum of its proper divisors (18340896712).

20956655288 is a wasteful number, since it uses less digits than its factorization.

20956655288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254894 (or 254890 counting only the distinct ones).

The product of its (nonzero) digits is 10368000, while the sum is 56.

The spelling of 20956655288 in words is "twenty billion, nine hundred fifty-six million, six hundred fifty-five thousand, two hundred eighty-eight".