21243362 has 32 divisors (see below), whose sum is σ = 37584000. Its totient is φ = 9001104.

The previous prime is 21243361. The next prime is 21243403. The reversal of 21243362 is 26334212.

It is not an unprimeable number, because it can be changed into a prime (21243361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118589 + ... + 118767.

It is an arithmetic number, because the mean of its divisors is an integer number (1174500).

Almost surely, 2^21243362 is an apocalyptic number.

21243362 is a deficient number, since it is larger than the sum of its proper divisors (16340638).

21243362 is a wasteful number, since it uses less digits than its factorization.

21243362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 361 counting only the distinct ones).

The product of its digits is 1728, while the sum is 23.

The square root of 21243362 is about 4609.0521802210. The cubic root of 21243362 is about 276.9540688525.

Adding to 21243362 its reverse (26334212), we get a palindrome (47577574).

The spelling of 21243362 in words is "twenty-one million, two hundred forty-three thousand, three hundred sixty-two".