20411129 has 2 divisors, whose sum is σ = 20411130. Its totient is φ = 20411128.

The previous prime is 20411107. The next prime is 20411141. The reversal of 20411129 is 92111402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17682025 + 2729104 = 4205^2 + 1652^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20411129 is a prime.

It is a super-2 number, since 2×20411129² = 833228374109282, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20411129.

It is not a weakly prime, because it can be changed into another prime (20411029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10205564 + 10205565.

It is an arithmetic number, because the mean of its divisors is an integer number (10205565).

Almost surely, 2^20411129 is an apocalyptic number.

It is an amenable number.

20411129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20411129 is an equidigital number, since it uses as much as digits as its factorization.

20411129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 20411129 is about 4517.8677492817. The cubic root of 20411129 is about 273.2891201869.

The spelling of 20411129 in words is "twenty million, four hundred eleven thousand, one hundred twenty-nine".