20430429 has 4 divisors (see below), whose sum is σ = 27240576. Its totient is φ = 13620284.

The previous prime is 20430409. The next prime is 20430439. The reversal of 20430429 is 92403402.

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 a cyclic number.

It is not a de Polignac number, because 20430429 - 2⁸ = 20430173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20430399 and 20430408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3405069 + ... + 3405074.

It is an arithmetic number, because the mean of its divisors is an integer number (6810144).

Almost surely, 2^20430429 is an apocalyptic number.

It is an amenable number.

20430429 is a deficient number, since it is larger than the sum of its proper divisors (6810147).

20430429 is an equidigital number, since it uses as much as digits as its factorization.

20430429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6810146.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20430429 is about 4520.0032079635. The cubic root of 20430429 is about 273.3752303745.

The spelling of 20430429 in words is "twenty million, four hundred thirty thousand, four hundred twenty-nine".