20026129 has 2 divisors, whose sum is σ = 20026130. Its totient is φ = 20026128.

The previous prime is 20026121. The next prime is 20026141. The reversal of 20026129 is 92162002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16184529 + 3841600 = 4023^2 + 1960^2 .

It is a cyclic number.

It is not a de Polignac number, because 20026129 - 2³ = 20026121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20026121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10013064 + 10013065.

It is an arithmetic number, because the mean of its divisors is an integer number (10013065).

Almost surely, 2^20026129 is an apocalyptic number.

It is an amenable number.

20026129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20026129 is an equidigital number, since it uses as much as digits as its factorization.

20026129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 20026129 is about 4475.0563124948. The cubic root of 20026129 is about 271.5599185822.

The spelling of 20026129 in words is "twenty million, twenty-six thousand, one hundred twenty-nine".