20854842 has 8 divisors (see below), whose sum is σ = 41709696. Its totient is φ = 6951612.

The previous prime is 20854739. The next prime is 20854843. The reversal of 20854842 is 24845802.

It is a happy number.

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

20854842 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20854843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1737898 + ... + 1737909.

It is an arithmetic number, because the mean of its divisors is an integer number (5213712).

Almost surely, 2^20854842 is an apocalyptic number.

20854842 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.

20854842 is a wasteful number, since it uses less digits than its factorization.

20854842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3475812.

The product of its (nonzero) digits is 20480, while the sum is 33.

The square root of 20854842 is about 4566.7101944398. The cubic root of 20854842 is about 275.2552649090.

The spelling of 20854842 in words is "twenty million, eight hundred fifty-four thousand, eight hundred forty-two".