20711111207 has 8 divisors (see below), whose sum is σ = 21402598800. Its totient is φ = 20029161600.

The previous prime is 20711111189. The next prime is 20711111219. The reversal of 20711111207 is 70211111702.

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

It is a cyclic number.

It is not a de Polignac number, because 20711111207 - 2⁶ = 20711111143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20711111257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2380082 + ... + 2388767.

It is an arithmetic number, because the mean of its divisors is an integer number (2675324850).

Almost surely, 2^20711111207 is an apocalyptic number.

20711111207 is a deficient number, since it is larger than the sum of its proper divisors (691487593).

20711111207 is a wasteful number, since it uses less digits than its factorization.

20711111207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4768993.

The product of its (nonzero) digits is 196, while the sum is 23.

Adding to 20711111207 its reverse (70211111702), we get a palindrome (90922222909).

The spelling of 20711111207 in words is "twenty billion, seven hundred eleven million, one hundred eleven thousand, two hundred seven".