20896665207 has 8 divisors (see below), whose sum is σ = 30395149440. Its totient is φ = 12664645560.

The previous prime is 20896665191. The next prime is 20896665221. The reversal of 20896665207 is 70256669802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20896665207 - 2⁴ = 20896665191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20896665207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20896661207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316616107 + ... + 316616172.

It is an arithmetic number, because the mean of its divisors is an integer number (3799393680).

Almost surely, 2^20896665207 is an apocalyptic number.

20896665207 is a deficient number, since it is larger than the sum of its proper divisors (9498484233).

20896665207 is a wasteful number, since it uses less digits than its factorization.

20896665207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633232293.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 20896665207 in words is "twenty billion, eight hundred ninety-six million, six hundred sixty-five thousand, two hundred seven".