21285614 has 8 divisors (see below), whose sum is σ = 36489648. Its totient is φ = 9122400.

The previous prime is 21285611. The next prime is 21285631. The reversal of 21285614 is 41658212.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21285611) by changing a digit.

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, 760187 + ... + 760214.

It is an arithmetic number, because the mean of its divisors is an integer number (4561206).

Almost surely, 2^21285614 is an apocalyptic number.

21285614 is a deficient number, since it is larger than the sum of its proper divisors (15204034).

21285614 is a wasteful number, since it uses less digits than its factorization.

21285614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520410.

The product of its digits is 3840, while the sum is 29.

The square root of 21285614 is about 4613.6334921621. The cubic root of 21285614 is about 277.1375632501.

The spelling of 21285614 in words is "twenty-one million, two hundred eighty-five thousand, six hundred fourteen".