20126233 has 4 divisors (see below), whose sum is σ = 20230708. Its totient is φ = 20021760.

The previous prime is 20126231. The next prime is 20126237. The reversal of 20126233 is 33262102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33262102 = 2 ⋅16631051.

It can be written as a sum of positive squares in 2 ways, for example, as 6310144 + 13816089 = 2512^2 + 3717^2 .

It is a cyclic number.

It is not a de Polignac number, because 20126233 - 2¹ = 20126231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20126233.

It is not an unprimeable number, because it can be changed into a prime (20126231) 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, 51948 + ... + 52333.

It is an arithmetic number, because the mean of its divisors is an integer number (5057677).

Almost surely, 2^20126233 is an apocalyptic number.

It is an amenable number.

20126233 is a deficient number, since it is larger than the sum of its proper divisors (104475).

20126233 is a wasteful number, since it uses less digits than its factorization.

20126233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104474.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 20126233 is about 4486.2270339340. The cubic root of 20126233 is about 272.0116461637.

Adding to 20126233 its reverse (33262102), we get a palindrome (53388335).

It can be divided in two parts, 201262 and 33, that added together give a triangular number (201295 = T₆₃₄).

The spelling of 20126233 in words is "twenty million, one hundred twenty-six thousand, two hundred thirty-three".