21196013 has 8 divisors (see below), whose sum is σ = 22394880. Its totient is φ = 20028400.

The previous prime is 21196009. The next prime is 21196067. The reversal of 21196013 is 31069112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21196013 - 2² = 21196009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21196013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21196003) 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, 6413 + ... + 9138.

It is an arithmetic number, because the mean of its divisors is an integer number (2799360).

Almost surely, 2^21196013 is an apocalyptic number.

It is an amenable number.

21196013 is a deficient number, since it is larger than the sum of its proper divisors (1198867).

21196013 is a wasteful number, since it uses less digits than its factorization.

21196013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15627.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 21196013 is about 4603.9127923974. The cubic root of 21196013 is about 276.7481495774.

The spelling of 21196013 in words is "twenty-one million, one hundred ninety-six thousand, thirteen".