21134616 has 32 divisors (see below), whose sum is σ = 53310960. Its totient is φ = 6981632.

The previous prime is 21134611. The next prime is 21134657. The reversal of 21134616 is 61643112.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21134611) 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 7 ways as a sum of consecutive naturals, for example, 1185 + ... + 6608.

Almost surely, 2^21134616 is an apocalyptic number.

It is an amenable number.

21134616 is an abundant number, since it is smaller than the sum of its proper divisors (32176344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21134616 is a wasteful number, since it uses less digits than its factorization.

21134616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7915 (or 7911 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 21134616 is about 4597.2400415902. The cubic root of 21134616 is about 276.4806788566.

Adding to 21134616 its reverse (61643112), we get a palindrome (82777728).

The spelling of 21134616 in words is "twenty-one million, one hundred thirty-four thousand, six hundred sixteen".