20885358 has 48 divisors (see below), whose sum is σ = 46379520. Its totient is φ = 6263712.

The previous prime is 20885341. The next prime is 20885383. The reversal of 20885358 is 85358802.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 43363 + ... + 43841.

It is an arithmetic number, because the mean of its divisors is an integer number (966240).

Almost surely, 2^20885358 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20885358, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23189760).

20885358 is an abundant number, since it is smaller than the sum of its proper divisors (25494162).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20885358 is a wasteful number, since it uses less digits than its factorization.

20885358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 39.

The square root of 20885358 is about 4570.0501091345. The cubic root of 20885358 is about 275.3894559044.

The spelling of 20885358 in words is "twenty million, eight hundred eighty-five thousand, three hundred fifty-eight".