21344067 has 20 divisors (see below), whose sum is σ = 32667096. Its totient is φ = 13880160.

The previous prime is 21344051. The next prime is 21344077. The reversal of 21344067 is 76044312.

21344067 is a `hidden beast` number, since 213 + 440 + 6 + 7 = 666.

It is not a de Polignac number, because 21344067 - 2⁴ = 21344051 is a prime.

It is a super-2 number, since 2×21344067² = 911138392200978, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 21344067.

It is not an unprimeable number, because it can be changed into a prime (21344077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 108 + ... + 6534.

Almost surely, 2^21344067 is an apocalyptic number.

21344067 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

21344067 is a deficient number, since it is larger than the sum of its proper divisors (11323029).

21344067 is an equidigital number, since it uses as much as digits as its factorization.

21344067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6480 (or 6471 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 21344067 is about 4619.9639608984. The cubic root of 21344067 is about 277.3910163713.

Adding to 21344067 its reverse (76044312), we get a palindrome (97388379).

The spelling of 21344067 in words is "twenty-one million, three hundred forty-four thousand, sixty-seven".