21067337 has 8 divisors (see below), whose sum is σ = 21360672. Its totient is φ = 20776000.

The previous prime is 21067331. The next prime is 21067349. The reversal of 21067337 is 73376012.

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 21067337 - 2¹⁶ = 21001801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21067331) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 42662 + ... + 43152.

It is an arithmetic number, because the mean of its divisors is an integer number (2670084).

Almost surely, 2^21067337 is an apocalyptic number.

It is an amenable number.

21067337 is a deficient number, since it is larger than the sum of its proper divisors (293335).

21067337 is a wasteful number, since it uses less digits than its factorization.

21067337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999.

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 21067337 is about 4589.9168837791. The cubic root of 21067337 is about 276.1869882149.

The spelling of 21067337 in words is "twenty-one million, sixty-seven thousand, three hundred thirty-seven".