20434307 has 4 divisors (see below), whose sum is σ = 20571600. Its totient is φ = 20297016.

The previous prime is 20434259. The next prime is 20434319. The reversal of 20434307 is 70343402.

It is a happy number.

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 20434307 - 2¹⁴ = 20417923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20434387) 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, 68423 + ... + 68720.

It is an arithmetic number, because the mean of its divisors is an integer number (5142900).

Almost surely, 2^20434307 is an apocalyptic number.

20434307 is a deficient number, since it is larger than the sum of its proper divisors (137293).

20434307 is a wasteful number, since it uses less digits than its factorization.

20434307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137292.

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 20434307 is about 4520.4321696050. The cubic root of 20434307 is about 273.3925261783.

Adding to 20434307 its reverse (70343402), we get a palindrome (90777709).

The spelling of 20434307 in words is "twenty million, four hundred thirty-four thousand, three hundred seven".