21448760 has 16 divisors (see below), whose sum is σ = 48259800. Its totient is φ = 8579488.

The previous prime is 21448723. The next prime is 21448793. The reversal of 21448760 is 6784412.

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, 268070 + ... + 268149.

Almost surely, 2^21448760 is an apocalyptic number.

21448760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21448760 is an abundant number, since it is smaller than the sum of its proper divisors (26811040).

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

21448760 is a wasteful number, since it uses less digits than its factorization.

21448760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536230 (or 536226 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 21448760 is about 4631.2806004387. The cubic root of 21448760 is about 277.8438126857.

The spelling of 21448760 in words is "twenty-one million, four hundred forty-eight thousand, seven hundred sixty".