20612160720157 has 2 divisors, whose sum is σ = 20612160720158. Its totient is φ = 20612160720156.

The previous prime is 20612160720133. The next prime is 20612160720167. The reversal of 20612160720157 is 75102706121602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12446402978916 + 8165757741241 = 3527946^2 + 2857579^2 .

It is a cyclic number.

It is not a de Polignac number, because 20612160720157 - 2²³ = 20612152331549 is a prime.

It is a super-2 number, since 2×20612160720157² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20612160720167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10306080360078 + 10306080360079.

It is an arithmetic number, because the mean of its divisors is an integer number (10306080360079).

Almost surely, 2^{20612160720157} is an apocalyptic number.

It is an amenable number.

20612160720157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20612160720157 is an equidigital number, since it uses as much as digits as its factorization.

20612160720157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 40.

Adding to 20612160720157 its reverse (75102706121602), we get a palindrome (95714866841759).

The spelling of 20612160720157 in words is "twenty trillion, six hundred twelve billion, one hundred sixty million, seven hundred twenty thousand, one hundred fifty-seven".