21317096 has 16 divisors (see below), whose sum is σ = 40041540. Its totient is φ = 10639360.

The previous prime is 21317083. The next prime is 21317129. The reversal of 21317096 is 69071312.

It can be written as a sum of positive squares in 2 ways, for example, as 20376196 + 940900 = 4514^2 + 970^2 .

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 3 ways as a sum of consecutive naturals, for example, 3050 + ... + 7206.

Almost surely, 2^21317096 is an apocalyptic number.

It is an amenable number.

21317096 is a deficient number, since it is larger than the sum of its proper divisors (18724444).

21317096 is a wasteful number, since it uses less digits than its factorization.

21317096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4804 (or 4800 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 21317096 is about 4617.0440760296. The cubic root of 21317096 is about 277.2741272673.

The spelling of 21317096 in words is "twenty-one million, three hundred seventeen thousand, ninety-six".