21103282 has 32 divisors (see below), whose sum is σ = 34670592. Its totient is φ = 9605904.

The previous prime is 21103267. The next prime is 21103301. The reversal of 21103282 is 28230112.

It is a super-2 number, since 2×21103282² = 890697022343048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92853 + ... + 93079.

It is an arithmetic number, because the mean of its divisors is an integer number (1083456).

Almost surely, 2^21103282 is an apocalyptic number.

21103282 is a deficient number, since it is larger than the sum of its proper divisors (13567310).

21103282 is a wasteful number, since it uses less digits than its factorization.

21103282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342.

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

The square root of 21103282 is about 4593.8308632339. The cubic root of 21103282 is about 276.3439753166.

Adding to 21103282 its reverse (28230112), we get a palindrome (49333394).

The spelling of 21103282 in words is "twenty-one million, one hundred three thousand, two hundred eighty-two".