21116367 has 12 divisors (see below), whose sum is σ = 30632160. Its totient is φ = 14017248.

The previous prime is 21116357. The next prime is 21116377. The reversal of 21116367 is 76361112.

21116367 is a `hidden beast` number, since 21 + 1 + 1 + 636 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (21116357) and next prime (21116377).

It is not a de Polignac number, because 21116367 - 2⁴ = 21116351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21116367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21116317) 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 11 ways as a sum of consecutive naturals, for example, 2758 + ... + 7059.

It is an arithmetic number, because the mean of its divisors is an integer number (2552680).

Almost surely, 2^21116367 is an apocalyptic number.

21116367 is a deficient number, since it is larger than the sum of its proper divisors (9515793).

21116367 is a wasteful number, since it uses less digits than its factorization.

21116367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10062 (or 10059 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 21116367 is about 4595.2548351533. The cubic root of 21116367 is about 276.4010788171.

Adding to 21116367 its reverse (76361112), we get a palindrome (97477479).

The spelling of 21116367 in words is "twenty-one million, one hundred sixteen thousand, three hundred sixty-seven".