21941282 has 16 divisors (see below), whose sum is σ = 36191232. Its totient is φ = 9893520.

The previous prime is 21941279. The next prime is 21941291. The reversal of 21941282 is 28214912.

It is a super-3 number, since 3×21941282³ (a number of 23 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1133 + ... + 6720.

It is an arithmetic number, because the mean of its divisors is an integer number (2261952).

Almost surely, 2^21941282 is an apocalyptic number.

21941282 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21941282 is a deficient number, since it is larger than the sum of its proper divisors (14249950).

21941282 is a wasteful number, since it uses less digits than its factorization.

21941282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7993.

The product of its digits is 2304, while the sum is 29.

The square root of 21941282 is about 4684.1522178512. The cubic root of 21941282 is about 279.9544228537.

The spelling of 21941282 in words is "twenty-one million, nine hundred forty-one thousand, two hundred eighty-two".