21283134 has 8 divisors (see below), whose sum is σ = 42566280. Its totient is φ = 7094376.

The previous prime is 21283127. The next prime is 21283139. The reversal of 21283134 is 43138212.

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

21283134 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21283139) 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 3 ways as a sum of consecutive naturals, for example, 1773589 + ... + 1773600.

It is an arithmetic number, because the mean of its divisors is an integer number (5320785).

Almost surely, 2^21283134 is an apocalyptic number.

21283134 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.

21283134 is a wasteful number, since it uses less digits than its factorization.

21283134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3547194.

The product of its digits is 1152, while the sum is 24.

The square root of 21283134 is about 4613.3647156929. The cubic root of 21283134 is about 277.1267996760.

The spelling of 21283134 in words is "twenty-one million, two hundred eighty-three thousand, one hundred thirty-four".