20338671 has 4 divisors (see below), whose sum is σ = 27118232. Its totient is φ = 13559112.

The previous prime is 20338663. The next prime is 20338709. The reversal of 20338671 is 17683302.

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

It is not a de Polignac number, because 20338671 - 2³ = 20338663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20338621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3389776 + ... + 3389781.

It is an arithmetic number, because the mean of its divisors is an integer number (6779558).

Almost surely, 2^20338671 is an apocalyptic number.

20338671 is a deficient number, since it is larger than the sum of its proper divisors (6779561).

20338671 is an equidigital number, since it uses as much as digits as its factorization.

20338671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6779560.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20338671 is about 4509.8415714967. The cubic root of 20338671 is about 272.9653513702.

The spelling of 20338671 in words is "twenty million, three hundred thirty-eight thousand, six hundred seventy-one".