20338447 has 4 divisors (see below), whose sum is σ = 20624976. Its totient is φ = 20051920.

The previous prime is 20338433. The next prime is 20338469. The reversal of 20338447 is 74483302.

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 20338447 - 2¹¹ = 20336399 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 (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, 143158 + ... + 143299.

It is an arithmetic number, because the mean of its divisors is an integer number (5156244).

Almost surely, 2^20338447 is an apocalyptic number.

20338447 is a deficient number, since it is larger than the sum of its proper divisors (286529).

20338447 is an equidigital number, since it uses as much as digits as its factorization.

20338447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286528.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 20338447 is about 4509.8167368531. The cubic root of 20338447 is about 272.9643492650.

The spelling of 20338447 in words is "twenty million, three hundred thirty-eight thousand, four hundred forty-seven".