21488348 has 48 divisors (see below), whose sum is σ = 45663744. Its totient is φ = 8648640.

The previous prime is 21488339. The next prime is 21488359. The reversal of 21488348 is 84388412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39011 + ... + 39557.

It is an arithmetic number, because the mean of its divisors is an integer number (951328).

Almost surely, 2^21488348 is an apocalyptic number.

21488348 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21488348, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22831872).

21488348 is an abundant number, since it is smaller than the sum of its proper divisors (24175396).

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

21488348 is a wasteful number, since it uses less digits than its factorization.

21488348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 640 counting only the distinct ones).

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

The square root of 21488348 is about 4635.5526099916. The cubic root of 21488348 is about 278.0146465033.

The spelling of 21488348 in words is "twenty-one million, four hundred eighty-eight thousand, three hundred forty-eight".