21193346 has 4 divisors (see below), whose sum is σ = 31790022. Its totient is φ = 10596672.

The previous prime is 21193343. The next prime is 21193357. The reversal of 21193346 is 64339112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20802721 + 390625 = 4561^2 + 625^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21193343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5298335 + ... + 5298338.

Almost surely, 2^21193346 is an apocalyptic number.

21193346 is a deficient number, since it is larger than the sum of its proper divisors (10596676).

21193346 is a wasteful number, since it uses less digits than its factorization.

21193346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10596675.

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

The square root of 21193346 is about 4603.6231383553. The cubic root of 21193346 is about 276.7365417612.

The spelling of 21193346 in words is "twenty-one million, one hundred ninety-three thousand, three hundred forty-six".