21120382 has 8 divisors (see below), whose sum is σ = 31738536. Its totient is φ = 10540872.

The previous prime is 21120367. The next prime is 21120383. The reversal of 21120382 is 28302112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8253 + ... + 10504.

It is an arithmetic number, because the mean of its divisors is an integer number (3967317).

Almost surely, 2^21120382 is an apocalyptic number.

21120382 is a deficient number, since it is larger than the sum of its proper divisors (10618154).

21120382 is a wasteful number, since it uses less digits than its factorization.

21120382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19322.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 21120382 is about 4595.6916780829. The cubic root of 21120382 is about 276.4185957192.

Adding to 21120382 its reverse (28302112), we get a palindrome (49422494).

The spelling of 21120382 in words is "twenty-one million, one hundred twenty thousand, three hundred eighty-two".