21483603 has 16 divisors (see below), whose sum is σ = 32430240. Its totient is φ = 14051232.

The previous prime is 21483593. The next prime is 21483641. The reversal of 21483603 is 30638412.

It is a happy number.

It is not a de Polignac number, because 21483603 - 2¹³ = 21475411 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21483103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6076 + ... + 8937.

It is an arithmetic number, because the mean of its divisors is an integer number (2026890).

Almost surely, 2^21483603 is an apocalyptic number.

21483603 is a deficient number, since it is larger than the sum of its proper divisors (10946637).

21483603 is a wasteful number, since it uses less digits than its factorization.

21483603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15075 (or 15069 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 21483603 is about 4635.0407765197. The cubic root of 21483603 is about 277.9941815113.

The spelling of 21483603 in words is "twenty-one million, four hundred eighty-three thousand, six hundred three".