21313196 has 12 divisors (see below), whose sum is σ = 37336152. Its totient is φ = 10645728.

The previous prime is 21313181. The next prime is 21313199. The reversal of 21313196 is 69131312.

It is not an unprimeable number, because it can be changed into a prime (21313199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3056 + ... + 7208.

It is an arithmetic number, because the mean of its divisors is an integer number (3111346).

Almost surely, 2^21313196 is an apocalyptic number.

It is an amenable number.

21313196 is a deficient number, since it is larger than the sum of its proper divisors (16022956).

21313196 is a wasteful number, since it uses less digits than its factorization.

21313196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5440 (or 5438 counting only the distinct ones).

The product of its digits is 972, while the sum is 26.

The square root of 21313196 is about 4616.6217085657. The cubic root of 21313196 is about 277.2572169738.

The spelling of 21313196 in words is "twenty-one million, three hundred thirteen thousand, one hundred ninety-six".