20854959 has 8 divisors (see below), whose sum is σ = 27827712. Its totient is φ = 13892760.

The previous prime is 20854949. The next prime is 20854961. The reversal of 20854959 is 95945802.

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

It is not a de Polignac number, because 20854959 - 2⁴ = 20854943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20854959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20854919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6432 + ... + 9114.

It is an arithmetic number, because the mean of its divisors is an integer number (3478464).

Almost surely, 2^20854959 is an apocalyptic number.

20854959 is a deficient number, since it is larger than the sum of its proper divisors (6972753).

20854959 is a wasteful number, since it uses less digits than its factorization.

20854959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5277.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 20854959 is about 4566.7230045187. The cubic root of 20854959 is about 275.2557796544.

The spelling of 20854959 in words is "twenty million, eight hundred fifty-four thousand, nine hundred fifty-nine".