21384848 has 20 divisors (see below), whose sum is σ = 43235328. Its totient is φ = 10227360.

The previous prime is 21384841. The next prime is 21384877. The reversal of 21384848 is 84848312.

It is not an unprimeable number, because it can be changed into a prime (21384841) 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, 28688 + ... + 29423.

Almost surely, 2^21384848 is an apocalyptic number.

It is an amenable number.

21384848 is an abundant number, since it is smaller than the sum of its proper divisors (21850480).

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

21384848 is a wasteful number, since it uses less digits than its factorization.

21384848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58142 (or 58136 counting only the distinct ones).

The product of its digits is 49152, while the sum is 38.

The square root of 21384848 is about 4624.3754172861. The cubic root of 21384848 is about 277.5675695103.

It can be divided in two parts, 21 and 384848, that multiplied together give a palindrome (8081808).

The spelling of 21384848 in words is "twenty-one million, three hundred eighty-four thousand, eight hundred forty-eight".