21294349 has 8 divisors (see below), whose sum is σ = 21589920. Its totient is φ = 21000816.

The previous prime is 21294347. The next prime is 21294359. The reversal of 21294349 is 94349212.

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

It is a cyclic number.

It is not a de Polignac number, because 21294349 - 2¹ = 21294347 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21294341) 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, 37542 + ... + 38104.

It is an arithmetic number, because the mean of its divisors is an integer number (2698740).

Almost surely, 2^21294349 is an apocalyptic number.

It is an amenable number.

21294349 is a deficient number, since it is larger than the sum of its proper divisors (295571).

21294349 is a wasteful number, since it uses less digits than its factorization.

21294349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019.

The product of its digits is 15552, while the sum is 34.

The square root of 21294349 is about 4614.5800458980. The cubic root of 21294349 is about 277.1754678109.

The spelling of 21294349 in words is "twenty-one million, two hundred ninety-four thousand, three hundred forty-nine".