20011233 has 16 divisors (see below), whose sum is σ = 29587392. Its totient is φ = 11928000.

The previous prime is 20011177. The next prime is 20011249. The reversal of 20011233 is 33211002.

It is a happy number.

It is not a de Polignac number, because 20011233 - 2⁹ = 20010721 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20011273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2958 + ... + 6983.

It is an arithmetic number, because the mean of its divisors is an integer number (1849212).

Almost surely, 2^20011233 is an apocalyptic number.

It is an amenable number.

20011233 is a deficient number, since it is larger than the sum of its proper divisors (9576159).

20011233 is a wasteful number, since it uses less digits than its factorization.

20011233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10016.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 20011233 is about 4473.3916662863. The cubic root of 20011233 is about 271.4925705702.

Adding to 20011233 its reverse (33211002), we get a palindrome (53222235).

The spelling of 20011233 in words is "twenty million, eleven thousand, two hundred thirty-three".