21210483 has 12 divisors (see below), whose sum is σ = 32898120. Its totient is φ = 12120192.

The previous prime is 21210463. The next prime is 21210487. The reversal of 21210483 is 38401212.

It is not a de Polignac number, because 21210483 - 2⁸ = 21210227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (21210487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71998 + ... + 72291.

It is an arithmetic number, because the mean of its divisors is an integer number (2741510).

Almost surely, 2^21210483 is an apocalyptic number.

21210483 is a deficient number, since it is larger than the sum of its proper divisors (11687637).

21210483 is a wasteful number, since it uses less digits than its factorization.

21210483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144306 (or 144299 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 21210483 is about 4605.4840136516. The cubic root of 21210483 is about 276.8111116512.

Adding to 21210483 its reverse (38401212), we get a palindrome (59611695).

The spelling of 21210483 in words is "twenty-one million, two hundred ten thousand, four hundred eighty-three".