20854358166 has 8 divisors (see below), whose sum is σ = 41708716344. Its totient is φ = 6951452720.

The previous prime is 20854358149. The next prime is 20854358207. The reversal of 20854358166 is 66185345802.

It is a happy number.

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

20854358166 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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, 1737863175 + ... + 1737863186.

It is an arithmetic number, because the mean of its divisors is an integer number (5213589543).

Almost surely, 2^20854358166 is an apocalyptic number.

20854358166 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.

20854358166 is a wasteful number, since it uses less digits than its factorization.

20854358166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3475726366.

The product of its (nonzero) digits is 1382400, while the sum is 48.

The spelling of 20854358166 in words is "twenty billion, eight hundred fifty-four million, three hundred fifty-eight thousand, one hundred sixty-six".