20671065706 has 8 divisors (see below), whose sum is σ = 31179820320. Its totient is φ = 10277792268.

The previous prime is 20671065683. The next prime is 20671065707. The reversal of 20671065706 is 60756017602.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (20671065707) by changing a digit.

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, 28869846 + ... + 28870561.

It is an arithmetic number, because the mean of its divisors is an integer number (3897477540).

Almost surely, 2^20671065706 is an apocalyptic number.

20671065706 is a deficient number, since it is larger than the sum of its proper divisors (10508754614).

20671065706 is a wasteful number, since it uses less digits than its factorization.

20671065706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57740588.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 20671065706 in words is "twenty billion, six hundred seventy-one million, sixty-five thousand, seven hundred six".