21364607 has 12 divisors (see below), whose sum is σ = 24722040. Its totient is φ = 18398160.

The previous prime is 21364601. The next prime is 21364627. The reversal of 21364607 is 70646312.

It is not a de Polignac number, because 21364607 - 2⁴ = 21364591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21364607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21364601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2348 + ... + 6945.

It is an arithmetic number, because the mean of its divisors is an integer number (2060170).

Almost surely, 2^21364607 is an apocalyptic number.

21364607 is a deficient number, since it is larger than the sum of its proper divisors (3357433).

21364607 is a wasteful number, since it uses less digits than its factorization.

21364607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9334 (or 9323 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 21364607 is about 4622.1863874145. The cubic root of 21364607 is about 277.4799682534.

The spelling of 21364607 in words is "twenty-one million, three hundred sixty-four thousand, six hundred seven".