21364350 has 48 divisors (see below), whose sum is σ = 60555648. Its totient is φ = 4883040.

The previous prime is 21364339. The next prime is 21364351. The reversal of 21364350 is 5346312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21364350.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21364351) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 9124 + ... + 11223.

It is an arithmetic number, because the mean of its divisors is an integer number (1261576).

Almost surely, 2^21364350 is an apocalyptic number.

21364350 is an abundant number, since it is smaller than the sum of its proper divisors (39191298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21364350 is a wasteful number, since it uses less digits than its factorization.

21364350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20369 (or 20364 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 21364350 is about 4622.1585866346. The cubic root of 21364350 is about 277.4788556245.

The spelling of 21364350 in words is "twenty-one million, three hundred sixty-four thousand, three hundred fifty".