20434203 has 12 divisors (see below), whose sum is σ = 30073680. Its totient is φ = 13365456.

The previous prime is 20434181. The next prime is 20434223. The reversal of 20434203 is 30243402.

It is not a de Polignac number, because 20434203 - 2⁵ = 20434171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20434223) 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, 20943 + ... + 21896.

It is an arithmetic number, because the mean of its divisors is an integer number (2506140).

Almost surely, 2^20434203 is an apocalyptic number.

20434203 is a deficient number, since it is larger than the sum of its proper divisors (9639477).

20434203 is a wasteful number, since it uses less digits than its factorization.

20434203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42898 (or 42895 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 20434203 is about 4520.4206662655. The cubic root of 20434203 is about 273.3920623689.

Adding to 20434203 its reverse (30243402), we get a palindrome (50677605).

The spelling of 20434203 in words is "twenty million, four hundred thirty-four thousand, two hundred three".