21445083 has 12 divisors (see below), whose sum is σ = 33792408. Its totient is φ = 12996960.

The previous prime is 21445037. The next prime is 21445111. The reversal of 21445083 is 38054412.

It is not a de Polignac number, because 21445083 - 2¹⁴ = 21428699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21445013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108210 + ... + 108407.

It is an arithmetic number, because the mean of its divisors is an integer number (2816034).

Almost surely, 2^21445083 is an apocalyptic number.

21445083 is a deficient number, since it is larger than the sum of its proper divisors (12347325).

21445083 is a wasteful number, since it uses less digits than its factorization.

21445083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216634 (or 216631 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 21445083 is about 4630.8836089887. The cubic root of 21445083 is about 277.8279346881.

Adding to 21445083 its reverse (38054412), we get a palindrome (59499495).

It can be divided in two parts, 2144 and 5083, that added together give a palindrome (7227).

The spelling of 21445083 in words is "twenty-one million, four hundred forty-five thousand, eighty-three".