21134234 has 8 divisors (see below), whose sum is σ = 34583328. Its totient is φ = 9606460.

The previous prime is 21134231. The next prime is 21134237. The reversal of 21134234 is 43243112.

It is an interprime number because it is at equal distance from previous prime (21134231) and next prime (21134237).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21134231) 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 3 ways as a sum of consecutive naturals, for example, 480302 + ... + 480345.

It is an arithmetic number, because the mean of its divisors is an integer number (4322916).

Almost surely, 2^21134234 is an apocalyptic number.

21134234 is a deficient number, since it is larger than the sum of its proper divisors (13449094).

21134234 is a wasteful number, since it uses less digits than its factorization.

21134234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960660.

The product of its digits is 576, while the sum is 20.

The square root of 21134234 is about 4597.1984947357. The cubic root of 21134234 is about 276.4790130862.

Adding to 21134234 its reverse (43243112), we get a palindrome (64377346).

The spelling of 21134234 in words is "twenty-one million, one hundred thirty-four thousand, two hundred thirty-four".