21093446 has 24 divisors (see below), whose sum is σ = 35163072. Its totient is φ = 9482000.

The previous prime is 21093437. The next prime is 21093451. The reversal of 21093446 is 64439012.

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 11 ways as a sum of consecutive naturals, for example, 24011 + ... + 24873.

It is an arithmetic number, because the mean of its divisors is an integer number (1465128).

Almost surely, 2^21093446 is an apocalyptic number.

21093446 is a deficient number, since it is larger than the sum of its proper divisors (14069626).

21093446 is a wasteful number, since it uses less digits than its factorization.

21093446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988 (or 977 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 21093446 is about 4592.7601722711. The cubic root of 21093446 is about 276.3010350487.

It can be divided in two parts, 2109 and 3446, that added together give a palindrome (5555).

The spelling of 21093446 in words is "twenty-one million, ninety-three thousand, four hundred forty-six".