21134132 has 12 divisors (see below), whose sum is σ = 37017540. Its totient is φ = 10557696.

The previous prime is 21134123. The next prime is 21134143. The reversal of 21134132 is 23143112.

It can be written as a sum of positive squares in 2 ways, for example, as 12988816 + 8145316 = 3604^2 + 2854^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21134132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6158 + ... + 8954.

It is an arithmetic number, because the mean of its divisors is an integer number (3084795).

Almost surely, 2^21134132 is an apocalyptic number.

It is an amenable number.

21134132 is a deficient number, since it is larger than the sum of its proper divisors (15883408).

21134132 is a wasteful number, since it uses less digits than its factorization.

21134132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4690 (or 4688 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 21134132 is about 4597.1874010094. The cubic root of 21134132 is about 276.4785682959.

Adding to 21134132 its reverse (23143112), we get a palindrome (44277244).

It can be divided in two parts, 211 and 34132, that added together give a palindrome (34343).

The spelling of 21134132 in words is "twenty-one million, one hundred thirty-four thousand, one hundred thirty-two".