20023736656 has 80 divisors (see below), whose sum is σ = 49281810048. Its totient is φ = 7654233600.

The previous prime is 20023736611. The next prime is 20023736657. The reversal of 20023736656 is 65663732002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023736657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88035 + ... + 218626.

Almost surely, 2^20023736656 is an apocalyptic number.

It is an amenable number.

20023736656 is an abundant number, since it is smaller than the sum of its proper divisors (29258073392).

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

20023736656 is a wasteful number, since it uses less digits than its factorization.

20023736656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306740 (or 306734 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 40.

The spelling of 20023736656 in words is "twenty billion, twenty-three million, seven hundred thirty-six thousand, six hundred fifty-six".