21342346 has 8 divisors (see below), whose sum is σ = 32033124. Its totient is φ = 10664640.

The previous prime is 21342341. The next prime is 21342359. The reversal of 21342346 is 64324312.

It can be written as a sum of positive squares in 2 ways, for example, as 18156121 + 3186225 = 4261^2 + 1785^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21342346.

It is not an unprimeable number, because it can be changed into a prime (21342341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4786 + ... + 8098.

Almost surely, 2^21342346 is an apocalyptic number.

21342346 is a deficient number, since it is larger than the sum of its proper divisors (10690778).

21342346 is a wasteful number, since it uses less digits than its factorization.

21342346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6536.

The product of its digits is 3456, while the sum is 25.

The square root of 21342346 is about 4619.7777002795. Note that the first 4 decimals coincide. The cubic root of 21342346 is about 277.3835607043.

Adding to 21342346 its reverse (64324312), we get a palindrome (85666658).

The spelling of 21342346 in words is "twenty-one million, three hundred forty-two thousand, three hundred forty-six".