21084262 has 8 divisors (see below), whose sum is σ = 33291000. Its totient is φ = 9987264.

The previous prime is 21084257. The next prime is 21084263. The reversal of 21084262 is 26248012.

It is a happy number.

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

It is a super-4 number, since 4×21084262⁴ (a number of 30 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21084263) 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, 277387 + ... + 277462.

It is an arithmetic number, because the mean of its divisors is an integer number (4161375).

Almost surely, 2^21084262 is an apocalyptic number.

21084262 is a deficient number, since it is larger than the sum of its proper divisors (12206738).

21084262 is a wasteful number, since it uses less digits than its factorization.

21084262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554870.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 21084262 is about 4591.7602289318. The cubic root of 21084262 is about 276.2609291145.

The spelling of 21084262 in words is "twenty-one million, eighty-four thousand, two hundred sixty-two".