20660301157 has 4 divisors (see below), whose sum is σ = 20662809760. Its totient is φ = 20657792556.

The previous prime is 20660301143. The next prime is 20660301163. The reversal of 20660301157 is 75110306602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20660301157 - 2³¹ = 18512817509 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 (20660301457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1241907 + ... + 1258432.

It is an arithmetic number, because the mean of its divisors is an integer number (5165702440).

Almost surely, 2^20660301157 is an apocalyptic number.

It is an amenable number.

20660301157 is a deficient number, since it is larger than the sum of its proper divisors (2508603).

20660301157 is an equidigital number, since it uses as much as digits as its factorization.

20660301157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508602.

The product of its (nonzero) digits is 7560, while the sum is 31.

Adding to 20660301157 its reverse (75110306602), we get a palindrome (95770607759).

Subtracting 20660301157 from its reverse (75110306602), we obtain a palindrome (54450005445).

The spelling of 20660301157 in words is "twenty billion, six hundred sixty million, three hundred one thousand, one hundred fifty-seven".