20580638 has 8 divisors (see below), whose sum is σ = 33245688. Its totient is φ = 9498744.

The previous prime is 20580631. The next prime is 20580649. The reversal of 20580638 is 83608502.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20580631) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 395756 + ... + 395807.

It is an arithmetic number, because the mean of its divisors is an integer number (4155711).

Almost surely, 2^20580638 is an apocalyptic number.

20580638 is a deficient number, since it is larger than the sum of its proper divisors (12665050).

20580638 is a wasteful number, since it uses less digits than its factorization.

20580638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791578.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 20580638 is about 4536.5888065814. The cubic root of 20580638 is about 274.0435666956.

The spelling of 20580638 in words is "twenty million, five hundred eighty thousand, six hundred thirty-eight".