20340829 has 2 divisors, whose sum is σ = 20340830. Its totient is φ = 20340828.

The previous prime is 20340799. The next prime is 20340833. The reversal of 20340829 is 92804302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20340100 + 729 = 4510^2 + 27^2 .

It is a cyclic number.

It is not a de Polignac number, because 20340829 - 2¹⁵ = 20308061 is a prime.

It is equal to p_1290817 and since 20340829 and 1290817 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 20340797 and 20340806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20340869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10170414 + 10170415.

It is an arithmetic number, because the mean of its divisors is an integer number (10170415).

Almost surely, 2^20340829 is an apocalyptic number.

It is an amenable number.

20340829 is a deficient number, since it is larger than the sum of its proper divisors (1).

20340829 is an equidigital number, since it uses as much as digits as its factorization.

20340829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20340829 is about 4510.0808196750. The cubic root of 20340829 is about 272.9750052031.

The spelling of 20340829 in words is "twenty million, three hundred forty thousand, eight hundred twenty-nine".