20660141 has 8 divisors (see below), whose sum is σ = 21726144. Its totient is φ = 19608160.

The previous prime is 20660137. The next prime is 20660153. The reversal of 20660141 is 14106602.

It is a happy number.

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 20660141 - 2² = 20660137 is a prime.

It is a super-2 number, since 2×20660141² = 853682852279762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20660161) 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 7 ways as a sum of consecutive naturals, for example, 416 + ... + 6441.

It is an arithmetic number, because the mean of its divisors is an integer number (2715768).

Almost surely, 2^20660141 is an apocalyptic number.

It is an amenable number.

20660141 is a deficient number, since it is larger than the sum of its proper divisors (1066003).

20660141 is a wasteful number, since it uses less digits than its factorization.

20660141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7011.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 20660141 is about 4545.3427813532. The cubic root of 20660141 is about 274.3959900263.

Adding to 20660141 its reverse (14106602), we get a palindrome (34766743).

The spelling of 20660141 in words is "twenty million, six hundred sixty thousand, one hundred forty-one".