21484583 has 4 divisors (see below), whose sum is σ = 22748400. Its totient is φ = 20220768.

The previous prime is 21484571. The next prime is 21484591. The reversal of 21484583 is 38548412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21484583 - 2⁸ = 21484327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21484513) 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, 631883 + ... + 631916.

It is an arithmetic number, because the mean of its divisors is an integer number (5687100).

Almost surely, 2^21484583 is an apocalyptic number.

21484583 is a deficient number, since it is larger than the sum of its proper divisors (1263817).

21484583 is a wasteful number, since it uses less digits than its factorization.

21484583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263816.

The product of its digits is 30720, while the sum is 35.

The square root of 21484583 is about 4635.1464917519. The cubic root of 21484583 is about 277.9984084584.

The spelling of 21484583 in words is "twenty-one million, four hundred eighty-four thousand, five hundred eighty-three".