21136282 has 16 divisors (see below), whose sum is σ = 32330592. Its totient is φ = 10361520.

The previous prime is 21136277. The next prime is 21136319. The reversal of 21136282 is 28263112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25657 + ... + 26467.

It is an arithmetic number, because the mean of its divisors is an integer number (2020662).

Almost surely, 2^21136282 is an apocalyptic number.

21136282 is a deficient number, since it is larger than the sum of its proper divisors (11194310).

21136282 is a wasteful number, since it uses less digits than its factorization.

21136282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053.

The product of its digits is 1152, while the sum is 25.

The square root of 21136282 is about 4597.4212336918. The cubic root of 21136282 is about 276.4879434742.

Adding to 21136282 its reverse (28263112), we get a palindrome (49399394).

The spelling of 21136282 in words is "twenty-one million, one hundred thirty-six thousand, two hundred eighty-two".