20812233 has 16 divisors (see below), whose sum is σ = 31643136. Its totient is φ = 12053760.

The previous prime is 20812213. The next prime is 20812247. The reversal of 20812233 is 33221802.

It is not a de Polignac number, because 20812233 - 2⁸ = 20811977 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20812213) 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 in 15 ways as a sum of consecutive naturals, for example, 15033 + ... + 16358.

It is an arithmetic number, because the mean of its divisors is an integer number (1977696).

Almost surely, 2^20812233 is an apocalyptic number.

It is an amenable number.

20812233 is a deficient number, since it is larger than the sum of its proper divisors (10830903).

20812233 is a wasteful number, since it uses less digits than its factorization.

20812233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31424.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20812233 is about 4562.0426346101. The cubic root of 20812233 is about 275.0676770074.

The spelling of 20812233 in words is "twenty million, eight hundred twelve thousand, two hundred thirty-three".