21302338 has 8 divisors (see below), whose sum is σ = 31974588. Its totient is φ = 10644144.

The previous prime is 21302321. The next prime is 21302371. The reversal of 21302338 is 83320312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16752649 + 4549689 = 4093^2 + 2133^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2020 + ... + 6832.

Almost surely, 2^21302338 is an apocalyptic number.

21302338 is a deficient number, since it is larger than the sum of its proper divisors (10672250).

21302338 is a wasteful number, since it uses less digits than its factorization.

21302338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7028.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 21302338 is about 4615.4455906229. The cubic root of 21302338 is about 277.2101261131.

The spelling of 21302338 in words is "twenty-one million, three hundred two thousand, three hundred thirty-eight".