21483968 has 28 divisors (see below), whose sum is σ = 46509432. Its totient is φ = 9765120.

The previous prime is 21483967. The next prime is 21483991. The reversal of 21483968 is 86938412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21483967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14555 + ... + 15962.

Almost surely, 2^21483968 is an apocalyptic number.

It is an amenable number.

21483968 is an abundant number, since it is smaller than the sum of its proper divisors (25025464).

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

21483968 is a wasteful number, since it uses less digits than its factorization.

21483968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30540 (or 30530 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 21483968 is about 4635.0801503318. The cubic root of 21483968 is about 277.9957558485.

It can be divided in two parts, 2148 and 3968, that added together give a palindrome (6116).

The spelling of 21483968 in words is "twenty-one million, four hundred eighty-three thousand, nine hundred sixty-eight".