20338547 has 4 divisors (see below), whose sum is σ = 20567160. Its totient is φ = 20109936.

The previous prime is 20338529. The next prime is 20338561. The reversal of 20338547 is 74583302.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20338547 - 2¹² = 20334451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20338247) 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, 114173 + ... + 114350.

It is an arithmetic number, because the mean of its divisors is an integer number (5141790).

Almost surely, 2^20338547 is an apocalyptic number.

20338547 is a deficient number, since it is larger than the sum of its proper divisors (228613).

20338547 is an equidigital number, since it uses as much as digits as its factorization.

20338547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228612.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 20338547 is about 4509.8278237645. The cubic root of 20338547 is about 272.9647966343.

The spelling of 20338547 in words is "twenty million, three hundred thirty-eight thousand, five hundred forty-seven".