21283485 has 16 divisors (see below), whose sum is σ = 34131264. Its totient is φ = 11325312.

The previous prime is 21283463. The next prime is 21283501. The reversal of 21283485 is 58438212.

It is not a de Polignac number, because 21283485 - 2¹² = 21279389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6489 + ... + 9201.

It is an arithmetic number, because the mean of its divisors is an integer number (2133204).

Almost surely, 2^21283485 is an apocalyptic number.

It is an amenable number.

21283485 is a deficient number, since it is larger than the sum of its proper divisors (12847779).

21283485 is a wasteful number, since it uses less digits than its factorization.

21283485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244.

The product of its digits is 15360, while the sum is 33.

The square root of 21283485 is about 4613.4027571848. The cubic root of 21283485 is about 277.1283231197.

The spelling of 21283485 in words is "twenty-one million, two hundred eighty-three thousand, four hundred eighty-five".