21303004 has 6 divisors (see below), whose sum is σ = 37280264. Its totient is φ = 10651500.

The previous prime is 21302993. The next prime is 21303011. The reversal of 21303004 is 40030312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2662872 + ... + 2662879.

Almost surely, 2^21303004 is an apocalyptic number.

It is an amenable number.

21303004 is a deficient number, since it is larger than the sum of its proper divisors (15977260).

21303004 is a wasteful number, since it uses less digits than its factorization.

21303004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5325755 (or 5325753 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 21303004 is about 4615.5177391058. The cubic root of 21303004 is about 277.2130149982.

Adding to 21303004 its reverse (40030312), we get a palindrome (61333316).

The spelling of 21303004 in words is "twenty-one million, three hundred three thousand, four".