21824485 has 8 divisors (see below), whose sum is σ = 26270496. Its totient is φ = 17405520.

The previous prime is 21824479. The next prime is 21824503. The reversal of 21824485 is 58442812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21824485 - 2⁷ = 21824357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21824485.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4939 + ... + 8248.

It is an arithmetic number, because the mean of its divisors is an integer number (3283812).

Almost surely, 2^21824485 is an apocalyptic number.

It is an amenable number.

21824485 is a deficient number, since it is larger than the sum of its proper divisors (4446011).

21824485 is a wasteful number, since it uses less digits than its factorization.

21824485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13523.

The product of its digits is 20480, while the sum is 34.

The square root of 21824485 is about 4671.6683315492. The cubic root of 21824485 is about 279.4567912272.

The spelling of 21824485 in words is "twenty-one million, eight hundred twenty-four thousand, four hundred eighty-five".