20123233 has 4 divisors (see below), whose sum is σ = 21671188. Its totient is φ = 18575280.

The previous prime is 20123231. The next prime is 20123237. The reversal of 20123233 is 33232102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6411024 + 13712209 = 2532^2 + 3703^2 .

It is a cyclic number.

It is not a de Polignac number, because 20123233 - 2¹ = 20123231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123231) 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 3 ways as a sum of consecutive naturals, for example, 773958 + ... + 773983.

It is an arithmetic number, because the mean of its divisors is an integer number (5417797).

Almost surely, 2^20123233 is an apocalyptic number.

It is an amenable number.

20123233 is a deficient number, since it is larger than the sum of its proper divisors (1547955).

20123233 is a wasteful number, since it uses less digits than its factorization.

20123233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547954.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 20123233 is about 4485.8926647881. The cubic root of 20123233 is about 271.9981302135.

Adding to 20123233 its reverse (33232102), we get a palindrome (53355335).

The spelling of 20123233 in words is "twenty million, one hundred twenty-three thousand, two hundred thirty-three".