20665365352 has 16 divisors (see below), whose sum is σ = 40786905600. Its totient is φ = 9788857200.

The previous prime is 20665365317. The next prime is 20665365389. The reversal of 20665365352 is 25356356602.

It is a junction number, because it is equal to n+sod(n) for n = 20665365299 and 20665365308.

It is an unprimeable number.

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, 67978024 + ... + 67978327.

It is an arithmetic number, because the mean of its divisors is an integer number (2549181600).

Almost surely, 2^20665365352 is an apocalyptic number.

It is an amenable number.

20665365352 is a deficient number, since it is larger than the sum of its proper divisors (20121540248).

20665365352 is a wasteful number, since it uses less digits than its factorization.

20665365352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135956376 (or 135956372 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 43.

The spelling of 20665365352 in words is "twenty billion, six hundred sixty-five million, three hundred sixty-five thousand, three hundred fifty-two".