20467157 has 2 divisors, whose sum is σ = 20467158. Its totient is φ = 20467156.

The previous prime is 20467151. The next prime is 20467177. The reversal of 20467157 is 75176402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20421361 + 45796 = 4519^2 + 214^2 .

It is a cyclic number.

It is not a de Polignac number, because 20467157 - 2⁴ = 20467141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20467151) 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, 10233578 + 10233579.

It is an arithmetic number, because the mean of its divisors is an integer number (10233579).

Almost surely, 2^20467157 is an apocalyptic number.

It is an amenable number.

20467157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20467157 is an equidigital number, since it uses as much as digits as its factorization.

20467157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 20467157 is about 4524.0642126301. The cubic root of 20467157 is about 273.5389488294.

The spelling of 20467157 in words is "twenty million, four hundred sixty-seven thousand, one hundred fifty-seven".