20984258 has 8 divisors (see below), whose sum is σ = 32208528. Its totient is φ = 10248084.

The previous prime is 20984233. The next prime is 20984261. The reversal of 20984258 is 85248902.

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

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, 121916 + ... + 122087.

It is an arithmetic number, because the mean of its divisors is an integer number (4026066).

Almost surely, 2^20984258 is an apocalyptic number.

20984258 is a deficient number, since it is larger than the sum of its proper divisors (11224270).

20984258 is a wasteful number, since it uses less digits than its factorization.

20984258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244048.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 20984258 is about 4580.8577799360. The cubic root of 20984258 is about 275.8234623347.

The spelling of 20984258 in words is "twenty million, nine hundred eighty-four thousand, two hundred fifty-eight".