21282016 has 24 divisors (see below), whose sum is σ = 47885040. Its totient is φ = 9120768.

The previous prime is 21282007. The next prime is 21282043. The reversal of 21282016 is 61028212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47281 + ... + 47728.

It is an arithmetic number, because the mean of its divisors is an integer number (1995210).

Almost surely, 2^21282016 is an apocalyptic number.

It is an amenable number.

21282016 is an abundant number, since it is smaller than the sum of its proper divisors (26603024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21282016 is an equidigital number, since it uses as much as digits as its factorization.

21282016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95026 (or 95018 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 21282016 is about 4613.2435444056. The cubic root of 21282016 is about 277.1219471139.

It can be divided in two parts, 212 and 82016, that added together give a palindrome (82228).

The spelling of 21282016 in words is "twenty-one million, two hundred eighty-two thousand, sixteen".