21094933 has 6 divisors (see below), whose sum is σ = 22052534. Its totient is φ = 20177256.

The previous prime is 21094907. The next prime is 21094937. The reversal of 21094933 is 33949012.

It can be written as a sum of positive squares in only one way, i.e., 14577124 + 6517809 = 3818^2 + 2553^2 .

It is not a de Polignac number, because 21094933 - 2⁹ = 21094421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21094895 and 21094904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21094937) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19410 + ... + 20467.

Almost surely, 2^21094933 is an apocalyptic number.

21094933 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21094933 is a deficient number, since it is larger than the sum of its proper divisors (957601).

21094933 is an equidigital number, since it uses as much as digits as its factorization.

21094933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39923 (or 39900 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 21094933 is about 4592.9220546402. The cubic root of 21094933 is about 276.3075275865.

The spelling of 21094933 in words is "twenty-one million, ninety-four thousand, nine hundred thirty-three".