21483965 has 16 divisors (see below), whose sum is σ = 27604800. Its totient is φ = 16002432.

The previous prime is 21483953. The next prime is 21483967. The reversal of 21483965 is 56938412.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21483965 - 2⁶ = 21483901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21483967) 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, 3689 + ... + 7521.

It is an arithmetic number, because the mean of its divisors is an integer number (1725300).

Almost surely, 2^21483965 is an apocalyptic number.

It is an amenable number.

21483965 is a deficient number, since it is larger than the sum of its proper divisors (6120835).

21483965 is a wasteful number, since it uses less digits than its factorization.

21483965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3916.

The product of its digits is 51840, while the sum is 38.

The square root of 21483965 is about 4635.0798267128. The cubic root of 21483965 is about 277.9957429088.

The spelling of 21483965 in words is "twenty-one million, four hundred eighty-three thousand, nine hundred sixty-five".