21283004 has 24 divisors (see below), whose sum is σ = 39409440. Its totient is φ = 10036224.

The previous prime is 21283001. The next prime is 21283033. The reversal of 21283004 is 40038212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21283001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5132 + ... + 8300.

It is an arithmetic number, because the mean of its divisors is an integer number (1642060).

Almost surely, 2^21283004 is an apocalyptic number.

It is an amenable number.

21283004 is a deficient number, since it is larger than the sum of its proper divisors (18126436).

21283004 is a wasteful number, since it uses less digits than its factorization.

21283004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3269 (or 3267 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 21283004 is about 4613.3506261718. The cubic root of 21283004 is about 277.1262354333.

The spelling of 21283004 in words is "twenty-one million, two hundred eighty-three thousand, four".