21484884 has 48 divisors (see below), whose sum is σ = 51480576. Its totient is φ = 6972000.

The previous prime is 21484843. The next prime is 21484913. The reversal of 21484884 is 48848412.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 128569 + ... + 128735.

It is an arithmetic number, because the mean of its divisors is an integer number (1072512).

Almost surely, 2^21484884 is an apocalyptic number.

It is an amenable number.

21484884 is an abundant number, since it is smaller than the sum of its proper divisors (29995692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21484884 is a wasteful number, since it uses less digits than its factorization.

21484884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 394 counting only the distinct ones).

The product of its digits is 65536, while the sum is 39.

The square root of 21484884 is about 4635.1789609464. The cubic root of 21484884 is about 277.9997067091. Note that the first 3 decimals are identical.

The spelling of 21484884 in words is "twenty-one million, four hundred eighty-four thousand, eight hundred eighty-four".