20660706157 has 32 divisors (see below), whose sum is σ = 25630843392. Its totient is φ = 16217397504.

The previous prime is 20660706151. The next prime is 20660706173. The reversal of 20660706157 is 75160706602.

It is a happy number.

It is not a de Polignac number, because 20660706157 - 2³ = 20660706149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20660706151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7115568 + ... + 7118470.

It is an arithmetic number, because the mean of its divisors is an integer number (800963856).

Almost surely, 2^20660706157 is an apocalyptic number.

It is an amenable number.

20660706157 is a deficient number, since it is larger than the sum of its proper divisors (4970137235).

20660706157 is a wasteful number, since it uses less digits than its factorization.

20660706157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3517.

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

The spelling of 20660706157 in words is "twenty billion, six hundred sixty million, seven hundred six thousand, one hundred fifty-seven".