21282093 has 24 divisors (see below), whose sum is σ = 35320896. Its totient is φ = 12096000.

The previous prime is 21282083. The next prime is 21282103. The reversal of 21282093 is 39028212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21282083) and next prime (21282103).

It is not a de Polignac number, because 21282093 - 2⁹ = 21281581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21282043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12493 + ... + 14093.

It is an arithmetic number, because the mean of its divisors is an integer number (1471704).

Almost surely, 2^21282093 is an apocalyptic number.

It is an amenable number.

21282093 is a deficient number, since it is larger than the sum of its proper divisors (14038803).

21282093 is a wasteful number, since it uses less digits than its factorization.

21282093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825 (or 1822 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 21282093 is about 4613.2518899362. The cubic root of 21282093 is about 277.1222813298.

It can be divided in two parts, 2128209 and 3, that added together give a palindrome (2128212).

The spelling of 21282093 in words is "twenty-one million, two hundred eighty-two thousand, ninety-three".