20327438 has 4 divisors (see below), whose sum is σ = 30491160. Its totient is φ = 10163718.

The previous prime is 20327399. The next prime is 20327443. The reversal of 20327438 is 83472302.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20327438.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5081858 + ... + 5081861.

It is an arithmetic number, because the mean of its divisors is an integer number (7622790).

Almost surely, 2^20327438 is an apocalyptic number.

20327438 is a deficient number, since it is larger than the sum of its proper divisors (10163722).

20327438 is a wasteful number, since it uses less digits than its factorization.

20327438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10163721.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 20327438 is about 4508.5960120641. The cubic root of 20327438 is about 272.9150894094.

The spelling of 20327438 in words is "twenty million, three hundred twenty-seven thousand, four hundred thirty-eight".