21094339 has 8 divisors (see below), whose sum is σ = 24939360. Its totient is φ = 17457216.

The previous prime is 21094279. The next prime is 21094357. The reversal of 21094339 is 93349012.

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

It is not a de Polignac number, because 21094339 - 2²³ = 12705731 is a prime.

It is a super-2 number, since 2×21094339² = 889942275693842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21094339.

It is not an unprimeable number, because it can be changed into a prime (21092339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51754 + ... + 52159.

It is an arithmetic number, because the mean of its divisors is an integer number (3117420).

Almost surely, 2^21094339 is an apocalyptic number.

21094339 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21094339 is a deficient number, since it is larger than the sum of its proper divisors (3845021).

21094339 is a wasteful number, since it uses less digits than its factorization.

21094339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103949.

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

The square root of 21094339 is about 4592.8573894690. The cubic root of 21094339 is about 276.3049341010.

It can be divided in two parts, 210 and 94339, that added together give a palindrome (94549).

The spelling of 21094339 in words is "twenty-one million, ninety-four thousand, three hundred thirty-nine".