21967367 has 8 divisors (see below), whose sum is σ = 22615824. Its totient is φ = 21325248.

The previous prime is 21967343. The next prime is 21967397. The reversal of 21967367 is 76376912.

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

It is not a de Polignac number, because 21967367 - 2⁶ = 21967303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21967397) 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, 5963 + ... + 8915.

It is an arithmetic number, because the mean of its divisors is an integer number (2826978).

Almost surely, 2^21967367 is an apocalyptic number.

21967367 is a deficient number, since it is larger than the sum of its proper divisors (648457).

21967367 is a wasteful number, since it uses less digits than its factorization.

21967367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3169.

The product of its digits is 95256, while the sum is 41.

The square root of 21967367 is about 4686.9357793765. The cubic root of 21967367 is about 280.0653206446.

The spelling of 21967367 in words is "twenty-one million, nine hundred sixty-seven thousand, three hundred sixty-seven".