20430473 has 8 divisors (see below), whose sum is σ = 23568192. Its totient is φ = 17347536.

The previous prime is 20430469. The next prime is 20430499. The reversal of 20430473 is 37403402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20430473 - 2² = 20430469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20430173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12890 + ... + 14387.

It is an arithmetic number, because the mean of its divisors is an integer number (2946024).

Almost surely, 2^20430473 is an apocalyptic number.

It is an amenable number.

20430473 is a deficient number, since it is larger than the sum of its proper divisors (3137719).

20430473 is a wasteful number, since it uses less digits than its factorization.

20430473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27391.

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

The square root of 20430473 is about 4520.0080752140. The cubic root of 20430473 is about 273.3754266259.

Adding to 20430473 its reverse (37403402), we get a palindrome (57833875).

The spelling of 20430473 in words is "twenty million, four hundred thirty thousand, four hundred seventy-three".