21484684 has 12 divisors (see below), whose sum is σ = 40490464. Its totient is φ = 9915984.

The previous prime is 21484681. The next prime is 21484699. The reversal of 21484684 is 48648412.

It is not an unprimeable number, because it can be changed into a prime (21484681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206532 + ... + 206635.

Almost surely, 2^21484684 is an apocalyptic number.

It is an amenable number.

21484684 is a deficient number, since it is larger than the sum of its proper divisors (19005780).

21484684 is a wasteful number, since it uses less digits than its factorization.

21484684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413184 (or 413182 counting only the distinct ones).

The product of its digits is 49152, while the sum is 37.

The square root of 21484684 is about 4635.1573867561. The cubic root of 21484684 is about 277.9988440854.

The spelling of 21484684 in words is "twenty-one million, four hundred eighty-four thousand, six hundred eighty-four".