21364175 has 12 divisors (see below), whose sum is σ = 30276336. Its totient is φ = 14649600.

The previous prime is 21364169. The next prime is 21364193. The reversal of 21364175 is 57146312.

It is not a de Polignac number, because 21364175 - 2⁶ = 21364111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60866 + ... + 61215.

It is an arithmetic number, because the mean of its divisors is an integer number (2523028).

Almost surely, 2^21364175 is an apocalyptic number.

21364175 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21364175 is a deficient number, since it is larger than the sum of its proper divisors (8912161).

21364175 is a wasteful number, since it uses less digits than its factorization.

21364175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122098 (or 122093 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

The square root of 21364175 is about 4622.1396560468. The cubic root of 21364175 is about 277.4780979927.

The spelling of 21364175 in words is "twenty-one million, three hundred sixty-four thousand, one hundred seventy-five".