21084652 has 12 divisors (see below), whose sum is σ = 38502576. Its totient is φ = 10083920.

The previous prime is 21084649. The next prime is 21084673. The reversal of 21084652 is 25648012.

It is a super-2 number, since 2×21084652² = 889125099922208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21084652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114499 + ... + 114682.

It is an arithmetic number, because the mean of its divisors is an integer number (3208548).

Almost surely, 2^21084652 is an apocalyptic number.

It is an amenable number.

21084652 is a deficient number, since it is larger than the sum of its proper divisors (17417924).

21084652 is a wasteful number, since it uses less digits than its factorization.

21084652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229208 (or 229206 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 21084652 is about 4591.8026961097. The cubic root of 21084652 is about 276.2626324561.

It can be divided in two parts, 21084 and 652, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 21084652 in words is "twenty-one million, eighty-four thousand, six hundred fifty-two".