20286429 has 4 divisors (see below), whose sum is σ = 27048576. Its totient is φ = 13524284.

The previous prime is 20286421. The next prime is 20286443. The reversal of 20286429 is 92468202.

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 20286429 - 2³ = 20286421 is a prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 20286429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20286421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3381069 + ... + 3381074.

It is an arithmetic number, because the mean of its divisors is an integer number (6762144).

Almost surely, 2^20286429 is an apocalyptic number.

It is an amenable number.

20286429 is a deficient number, since it is larger than the sum of its proper divisors (6762147).

20286429 is an equidigital number, since it uses as much as digits as its factorization.

20286429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6762146.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 20286429 is about 4504.0458479016. The cubic root of 20286429 is about 272.7314376435.

The spelling of 20286429 in words is "twenty million, two hundred eighty-six thousand, four hundred twenty-nine".