21167373 has 8 divisors (see below), whose sum is σ = 28439136. Its totient is φ = 14003600.

The previous prime is 21167359. The next prime is 21167401. The reversal of 21167373 is 37376112.

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 21167373 - 2⁸ = 21167117 is a prime.

It is a super-2 number, since 2×21167373² = 896115359442258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21167373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21167323) 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 7 ways as a sum of consecutive naturals, for example, 26538 + ... + 27323.

It is an arithmetic number, because the mean of its divisors is an integer number (3554892).

Almost surely, 2^21167373 is an apocalyptic number.

It is an amenable number.

21167373 is a deficient number, since it is larger than the sum of its proper divisors (7271763).

21167373 is a wasteful number, since it uses less digits than its factorization.

21167373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53995.

The product of its digits is 5292, while the sum is 30.

The square root of 21167373 is about 4600.8013432445. The cubic root of 21167373 is about 276.6234462574.

The spelling of 21167373 in words is "twenty-one million, one hundred sixty-seven thousand, three hundred seventy-three".