20908714209 has 8 divisors (see below), whose sum is σ = 28065388800. Its totient is φ = 13845591216.

The previous prime is 20908714207. The next prime is 20908714219. The reversal of 20908714209 is 90241780902.

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

It is not a de Polignac number, because 20908714209 - 2¹ = 20908714207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20908714207) 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, 23387377 + ... + 23388270.

It is an arithmetic number, because the mean of its divisors is an integer number (3508173600).

Almost surely, 2^20908714209 is an apocalyptic number.

It is an amenable number.

20908714209 is a deficient number, since it is larger than the sum of its proper divisors (7156674591).

20908714209 is a wasteful number, since it uses less digits than its factorization.

20908714209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46775799.

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 20908714209 in words is "twenty billion, nine hundred eight million, seven hundred fourteen thousand, two hundred nine".