20675438 has 8 divisors (see below), whose sum is σ = 35443632. Its totient is φ = 8860896.

The previous prime is 20675437. The next prime is 20675443. The reversal of 20675438 is 83457602.

It is a happy number.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20675398 and 20675407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20675437) 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, 738395 + ... + 738422.

It is an arithmetic number, because the mean of its divisors is an integer number (4430454).

Almost surely, 2^20675438 is an apocalyptic number.

20675438 is a deficient number, since it is larger than the sum of its proper divisors (14768194).

20675438 is a wasteful number, since it uses less digits than its factorization.

20675438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476826.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 20675438 is about 4547.0251813686. The cubic root of 20675438 is about 274.4636952748.

The spelling of 20675438 in words is "twenty million, six hundred seventy-five thousand, four hundred thirty-eight".