23285720736 has 36 divisors (see below), whose sum is σ = 66218769162. Its totient is φ = 7761906816.

The previous prime is 23285720707. The next prime is 23285720741. The reversal of 23285720736 is 63702758232.

23285720736 is a `hidden beast` number, since 2 + 3 + 2 + 8 + 572 + 0 + 73 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12227936400 + 11057784336 = 110580^2 + 105156^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 23285720691 and 23285720700.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40426311 + ... + 40426886.

Almost surely, 2^23285720736 is an apocalyptic number.

It is an amenable number.

23285720736 is an abundant number, since it is smaller than the sum of its proper divisors (42933048426).

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

23285720736 is a wasteful number, since it uses less digits than its factorization.

23285720736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80853213 (or 80853202 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 23285720736 in words is "twenty-three billion, two hundred eighty-five million, seven hundred twenty thousand, seven hundred thirty-six".