20923033 has 2 divisors, whose sum is σ = 20923034. Its totient is φ = 20923032.

The previous prime is 20923003. The next prime is 20923103. The reversal of 20923033 is 33032902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17867529 + 3055504 = 4227^2 + 1748^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20923033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20922995 and 20923013.

It is not a weakly prime, because it can be changed into another prime (20923003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10461516 + 10461517.

It is an arithmetic number, because the mean of its divisors is an integer number (10461517).

Almost surely, 2^20923033 is an apocalyptic number.

It is an amenable number.

20923033 is a deficient number, since it is larger than the sum of its proper divisors (1).

20923033 is an equidigital number, since it uses as much as digits as its factorization.

20923033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 22.

The square root of 20923033 is about 4574.1701979703. The cubic root of 20923033 is about 275.5549476865.

Adding to 20923033 its reverse (33032902), we get a palindrome (53955935).

The spelling of 20923033 in words is "twenty million, nine hundred twenty-three thousand, thirty-three".