21484637 has 8 divisors (see below), whose sum is σ = 21816000. Its totient is φ = 21155904.

The previous prime is 21484607. The next prime is 21484669. The reversal of 21484637 is 73648412.

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

It is a cyclic number.

It is not a de Polignac number, because 21484637 - 2¹² = 21480541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21484597 and 21484606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21484607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20789 + ... + 21797.

It is an arithmetic number, because the mean of its divisors is an integer number (2727000).

Almost surely, 2^21484637 is an apocalyptic number.

It is an amenable number.

21484637 is a deficient number, since it is larger than the sum of its proper divisors (331363).

21484637 is a wasteful number, since it uses less digits than its factorization.

21484637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315.

The product of its digits is 32256, while the sum is 35.

The square root of 21484637 is about 4635.1523168069. The cubic root of 21484637 is about 277.9986413680.

The spelling of 21484637 in words is "twenty-one million, four hundred eighty-four thousand, six hundred thirty-seven".