21233134 has 16 divisors (see below), whose sum is σ = 34393968. Its totient is φ = 9772992.

The previous prime is 21233131. The next prime is 21233161. The reversal of 21233134 is 43133212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10989 + ... + 12775.

It is an arithmetic number, because the mean of its divisors is an integer number (2149623).

Almost surely, 2^21233134 is an apocalyptic number.

21233134 is a deficient number, since it is larger than the sum of its proper divisors (13160834).

21233134 is a wasteful number, since it uses less digits than its factorization.

21233134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2259.

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

The square root of 21233134 is about 4607.9424909606. The cubic root of 21233134 is about 276.9096135390.

Adding to 21233134 its reverse (43133212), we get a palindrome (64366346).

The spelling of 21233134 in words is "twenty-one million, two hundred thirty-three thousand, one hundred thirty-four".