20830429 has 2 divisors, whose sum is σ = 20830430. Its totient is φ = 20830428.

The previous prime is 20830421. The next prime is 20830471. The reversal of 20830429 is 92403802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19598329 + 1232100 = 4427^2 + 1110^2 .

It is a cyclic number.

It is not a de Polignac number, because 20830429 - 2³ = 20830421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20830397 and 20830406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20830421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10415214 + 10415215.

It is an arithmetic number, because the mean of its divisors is an integer number (10415215).

Almost surely, 2^20830429 is an apocalyptic number.

It is an amenable number.

20830429 is a deficient number, since it is larger than the sum of its proper divisors (1).

20830429 is an equidigital number, since it uses as much as digits as its factorization.

20830429 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 20830429 is about 4564.0364810111. The cubic root of 20830429 is about 275.1478169505.

The spelling of 20830429 in words is "twenty million, eight hundred thirty thousand, four hundred twenty-nine".