20853258 has 8 divisors (see below), whose sum is σ = 41706528. Its totient is φ = 6951084.

The previous prime is 20853257. The next prime is 20853269. The reversal of 20853258 is 85235802.

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

20853258 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20853257) 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, 1737766 + ... + 1737777.

It is an arithmetic number, because the mean of its divisors is an integer number (5213316).

Almost surely, 2^20853258 is an apocalyptic number.

20853258 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20853258 is a wasteful number, since it uses less digits than its factorization.

20853258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3475548.

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 20853258 is about 4566.5367621426. The cubic root of 20853258 is about 275.2482958579.

The spelling of 20853258 in words is "twenty million, eight hundred fifty-three thousand, two hundred fifty-eight".