21093266 has 8 divisors (see below), whose sum is σ = 32731020. Its totient is φ = 10182928.

The previous prime is 21093253. The next prime is 21093283. The reversal of 21093266 is 66239012.

It can be written as a sum of positive squares in 2 ways, for example, as 20967241 + 126025 = 4579^2 + 355^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181781 + ... + 181896.

Almost surely, 2^21093266 is an apocalyptic number.

21093266 is a deficient number, since it is larger than the sum of its proper divisors (11637754).

21093266 is a wasteful number, since it uses less digits than its factorization.

21093266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363708.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 21093266 is about 4592.7405761702. The cubic root of 21093266 is about 276.3002491122.

The spelling of 21093266 in words is "twenty-one million, ninety-three thousand, two hundred sixty-six".