20546129 has 2 divisors, whose sum is σ = 20546130. Its totient is φ = 20546128.

The previous prime is 20546089. The next prime is 20546143. The reversal of 20546129 is 92164502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19228225 + 1317904 = 4385^2 + 1148^2 .

It is a cyclic number.

It is not a de Polignac number, because 20546129 - 2²⁴ = 3768913 is a prime.

It is not a weakly prime, because it can be changed into another prime (20546159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10273064 + 10273065.

It is an arithmetic number, because the mean of its divisors is an integer number (10273065).

Almost surely, 2^20546129 is an apocalyptic number.

It is an amenable number.

20546129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20546129 is an equidigital number, since it uses as much as digits as its factorization.

20546129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 20546129 is about 4532.7838024772. The cubic root of 20546129 is about 273.8903116460.

The spelling of 20546129 in words is "twenty million, five hundred forty-six thousand, one hundred twenty-nine".