21483645 has 8 divisors (see below), whose sum is σ = 34373856. Its totient is φ = 11457936.

The previous prime is 21483641. The next prime is 21483689. The reversal of 21483645 is 54638412.

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

It is not a de Polignac number, because 21483645 - 2² = 21483641 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21483641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716107 + ... + 716136.

It is an arithmetic number, because the mean of its divisors is an integer number (4296732).

Almost surely, 2^21483645 is an apocalyptic number.

It is an amenable number.

21483645 is a deficient number, since it is larger than the sum of its proper divisors (12890211).

21483645 is a wasteful number, since it uses less digits than its factorization.

21483645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432251.

The product of its digits is 23040, while the sum is 33.

The square root of 21483645 is about 4635.0453072219. The cubic root of 21483645 is about 277.9943626688.

The spelling of 21483645 in words is "twenty-one million, four hundred eighty-three thousand, six hundred forty-five".