20530433 has 12 divisors (see below), whose sum is σ = 25791360. Its totient is φ = 15997080.

The previous prime is 20530427. The next prime is 20530453. The reversal of 20530433 is 33403502.

It is not a de Polignac number, because 20530433 - 2⁴ = 20530417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20530423) 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, 11273 + ... + 12966.

It is an arithmetic number, because the mean of its divisors is an integer number (2149280).

Almost surely, 2^20530433 is an apocalyptic number.

It is an amenable number.

20530433 is a deficient number, since it is larger than the sum of its proper divisors (5260927).

20530433 is a wasteful number, since it uses less digits than its factorization.

20530433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24268 (or 24257 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 20.

The square root of 20530433 is about 4531.0520853329. The cubic root of 20530433 is about 273.8205486667.

Adding to 20530433 its reverse (33403502), we get a palindrome (53933935).

The spelling of 20530433 in words is "twenty million, five hundred thirty thousand, four hundred thirty-three".