21199337 has 8 divisors (see below), whose sum is σ = 21887712. Its totient is φ = 20519200.

The previous prime is 21199331. The next prime is 21199361. The reversal of 21199337 is 73399112.

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 21199337 - 2⁸ = 21199081 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21199297 and 21199306.

It is not an unprimeable number, because it can be changed into a prime (21199331) 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, 3398 + ... + 7344.

It is an arithmetic number, because the mean of its divisors is an integer number (2735964).

Almost surely, 2^21199337 is an apocalyptic number.

It is an amenable number.

21199337 is a deficient number, since it is larger than the sum of its proper divisors (688375).

21199337 is a wasteful number, since it uses less digits than its factorization.

21199337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4119.

The product of its digits is 10206, while the sum is 35.

The square root of 21199337 is about 4604.2737755264. The cubic root of 21199337 is about 276.7626155490.

The spelling of 21199337 in words is "twenty-one million, one hundred ninety-nine thousand, three hundred thirty-seven".