20434303 has 4 divisors (see below), whose sum is σ = 20447680. Its totient is φ = 20420928.

The previous prime is 20434259. The next prime is 20434319. The reversal of 20434303 is 30343402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20434303 - 2¹³ = 20426111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20434703) 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, 4050 + ... + 7567.

It is an arithmetic number, because the mean of its divisors is an integer number (5111920).

Almost surely, 2^20434303 is an apocalyptic number.

20434303 is a deficient number, since it is larger than the sum of its proper divisors (13377).

20434303 is a wasteful number, since it uses less digits than its factorization.

20434303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13376.

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 20434303 is about 4520.4317271694. The cubic root of 20434303 is about 273.3925083395.

Adding to 20434303 its reverse (30343402), we get a palindrome (50777705).

Subtracting 20434303 from its reverse (30343402), we obtain a palindrome (9909099).

The spelling of 20434303 in words is "twenty million, four hundred thirty-four thousand, three hundred three".