21543348 has 12 divisors (see below), whose sum is σ = 50267840. Its totient is φ = 7181112.

The previous prime is 21543331. The next prime is 21543371. The reversal of 21543348 is 84334512.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 897628 + ... + 897651.

Almost surely, 2^21543348 is an apocalyptic number.

It is an amenable number.

21543348 is an abundant number, since it is smaller than the sum of its proper divisors (28724492).

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

21543348 is a wasteful number, since it uses less digits than its factorization.

21543348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795286 (or 1795284 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 21543348 is about 4641.4812290906. The cubic root of 21543348 is about 278.2516397230.

The spelling of 21543348 in words is "twenty-one million, five hundred forty-three thousand, three hundred forty-eight".