21083746 has 8 divisors (see below), whose sum is σ = 31646160. Its totient is φ = 10535028.

The previous prime is 21083719. The next prime is 21083773. The reversal of 21083746 is 64738012.

It is an interprime number because it is at equal distance from previous prime (21083719) and next prime (21083773).

It is a sphenic number, since it is the product of 3 distinct primes.

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, 2425 + ... + 6931.

It is an arithmetic number, because the mean of its divisors is an integer number (3955770).

Almost surely, 2^21083746 is an apocalyptic number.

21083746 is a deficient number, since it is larger than the sum of its proper divisors (10562414).

21083746 is a wasteful number, since it uses less digits than its factorization.

21083746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6848.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 21083746 is about 4591.7040409852. The cubic root of 21083746 is about 276.2586754303.

The spelling of 21083746 in words is "twenty-one million, eighty-three thousand, seven hundred forty-six".