21048544 has 24 divisors (see below), whose sum is σ = 45207288. Its totient is φ = 9567360.

The previous prime is 21048541. The next prime is 21048553. The reversal of 21048544 is 44584012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21048541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29547 + ... + 30250.

It is an arithmetic number, because the mean of its divisors is an integer number (1883637).

Almost surely, 2^21048544 is an apocalyptic number.

It is an amenable number.

21048544 is an abundant number, since it is smaller than the sum of its proper divisors (24158744).

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

21048544 is a wasteful number, since it uses less digits than its factorization.

21048544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59818 (or 59810 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 21048544 is about 4587.8692221989. The cubic root of 21048544 is about 276.1048400981.

It can be divided in two parts, 2104 and 8544, that added together give a cube (10648 = 22³).

The spelling of 21048544 in words is "twenty-one million, forty-eight thousand, five hundred forty-four".