20838429 has 12 divisors (see below), whose sum is σ = 30524832. Its totient is φ = 13696200.

The previous prime is 20838401. The next prime is 20838431. The reversal of 20838429 is 92483802.

It is not a de Polignac number, because 20838429 - 2⁸ = 20838173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20838393 and 20838402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20838439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15667 + ... + 16944.

It is an arithmetic number, because the mean of its divisors is an integer number (2543736).

Almost surely, 2^20838429 is an apocalyptic number.

It is an amenable number.

20838429 is a deficient number, since it is larger than the sum of its proper divisors (9686403).

20838429 is a wasteful number, since it uses less digits than its factorization.

20838429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32688 (or 32685 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 20838429 is about 4564.9128140634. The cubic root of 20838429 is about 275.1830362732.

The spelling of 20838429 in words is "twenty million, eight hundred thirty-eight thousand, four hundred twenty-nine".