20985358 has 8 divisors (see below), whose sum is σ = 32245920. Its totient is φ = 10236720.

The previous prime is 20985337. The next prime is 20985373. The reversal of 20985358 is 85358902.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20985358.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127878 + ... + 128041.

It is an arithmetic number, because the mean of its divisors is an integer number (4030740).

Almost surely, 2^20985358 is an apocalyptic number.

20985358 is a deficient number, since it is larger than the sum of its proper divisors (11260562).

20985358 is a wasteful number, since it uses less digits than its factorization.

20985358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255962.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 20985358 is about 4580.9778432121. The cubic root of 20985358 is about 275.8282818286.

The spelling of 20985358 in words is "twenty million, nine hundred eighty-five thousand, three hundred fifty-eight".