20068129 has 4 divisors (see below), whose sum is σ = 20715520. Its totient is φ = 19420740.

The previous prime is 20068117. The next prime is 20068141. The reversal of 20068129 is 92186002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (20068117) and next prime (20068141).

It is a cyclic number.

It is not a de Polignac number, because 20068129 - 2⁹ = 20067617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20068097 and 20068106.

It is not an unprimeable number, because it can be changed into a prime (20068729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323649 + ... + 323710.

It is an arithmetic number, because the mean of its divisors is an integer number (5178880).

Almost surely, 2^20068129 is an apocalyptic number.

It is an amenable number.

20068129 is a deficient number, since it is larger than the sum of its proper divisors (647391).

20068129 is an equidigital number, since it uses as much as digits as its factorization.

20068129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647390.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 20068129 is about 4479.7465330083. The cubic root of 20068129 is about 271.7496299407.

The spelling of 20068129 in words is "twenty million, sixty-eight thousand, one hundred twenty-nine".