20460157 has 2 divisors, whose sum is σ = 20460158. Its totient is φ = 20460156.

The previous prime is 20460151. The next prime is 20460199. The reversal of 20460157 is 75106402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19263321 + 1196836 = 4389^2 + 1094^2 .

It is a cyclic number.

It is not a de Polignac number, because 20460157 - 2¹⁹ = 19935869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20460151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10230078 + 10230079.

It is an arithmetic number, because the mean of its divisors is an integer number (10230079).

Almost surely, 2^20460157 is an apocalyptic number.

It is an amenable number.

20460157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20460157 is an equidigital number, since it uses as much as digits as its factorization.

20460157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20460157 is about 4523.2905058154. The cubic root of 20460157 is about 273.5077607986.

Adding to 20460157 its reverse (75106402), we get a palindrome (95566559).

The spelling of 20460157 in words is "twenty million, four hundred sixty thousand, one hundred fifty-seven".