21067336 has 8 divisors (see below), whose sum is σ = 39501270. Its totient is φ = 10533664.

The previous prime is 21067331. The next prime is 21067349. The reversal of 21067336 is 63376012.

It can be written as a sum of positive squares in only one way, i.e., 11519236 + 9548100 = 3394^2 + 3090^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21067336² = 887665292273792, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1316701 + ... + 1316716.

Almost surely, 2^21067336 is an apocalyptic number.

It is an amenable number.

21067336 is a deficient number, since it is larger than the sum of its proper divisors (18433934).

21067336 is a wasteful number, since it uses less digits than its factorization.

21067336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633423 (or 2633419 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 21067336 is about 4589.9167748446. The cubic root of 21067336 is about 276.1869838450.

The spelling of 21067336 in words is "twenty-one million, sixty-seven thousand, three hundred thirty-six".