21560048 has 40 divisors (see below), whose sum is σ = 43538880. Its totient is φ = 10333440.

The previous prime is 21560047. The next prime is 21560053. The reversal of 21560048 is 84006512.

It is a junction number, because it is equal to n+sod(n) for n = 21559999 and 21560026.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21560047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46538 + ... + 46998.

It is an arithmetic number, because the mean of its divisors is an integer number (1088472).

Almost surely, 2^21560048 is an apocalyptic number.

It is an amenable number.

21560048 is an abundant number, since it is smaller than the sum of its proper divisors (21978832).

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

21560048 is a wasteful number, since it uses less digits than its factorization.

21560048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 579 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 21560048 is about 4643.2798752606. The cubic root of 21560048 is about 278.3235196400.

The spelling of 21560048 in words is "twenty-one million, five hundred sixty thousand, forty-eight".