21440362 has 4 divisors (see below), whose sum is σ = 32160546. Its totient is φ = 10720180.

The previous prime is 21440357. The next prime is 21440369. The reversal of 21440362 is 26304412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14891881 + 6548481 = 3859^2 + 2559^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (21440369) 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 as a sum of consecutive naturals, namely, 5360089 + ... + 5360092.

Almost surely, 2^21440362 is an apocalyptic number.

21440362 is a deficient number, since it is larger than the sum of its proper divisors (10720184).

21440362 is a wasteful number, since it uses less digits than its factorization.

21440362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10720183.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 21440362 is about 4630.3738509973. The cubic root of 21440362 is about 277.8075458350.

Adding to 21440362 its reverse (26304412), we get a palindrome (47744774).

The spelling of 21440362 in words is "twenty-one million, four hundred forty thousand, three hundred sixty-two".