21343134 has 8 divisors (see below), whose sum is σ = 42686280. Its totient is φ = 7114376.

The previous prime is 21343129. The next prime is 21343139. The reversal of 21343134 is 43134312.

It is an interprime number because it is at equal distance from previous prime (21343129) and next prime (21343139).

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

21343134 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21343134.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1778589 + ... + 1778600.

It is an arithmetic number, because the mean of its divisors is an integer number (5335785).

Almost surely, 2^21343134 is an apocalyptic number.

21343134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21343134 is a wasteful number, since it uses less digits than its factorization.

21343134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3557194.

The product of its digits is 864, while the sum is 21.

The square root of 21343134 is about 4619.8629849813. The cubic root of 21343134 is about 277.3869745051.

Adding to 21343134 its reverse (43134312), we get a palindrome (64477446).

The spelling of 21343134 in words is "twenty-one million, three hundred forty-three thousand, one hundred thirty-four".