20255966 has 16 divisors (see below), whose sum is σ = 31199040. Its totient is φ = 9858720.

The previous prime is 20255953. The next prime is 20255981. The reversal of 20255966 is 66955202.

It is a super-3 number, since 3×20255966³ (a number of 23 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 21056 + ... + 21996.

It is an arithmetic number, because the mean of its divisors is an integer number (1949940).

Almost surely, 2^20255966 is an apocalyptic number.

20255966 is a deficient number, since it is larger than the sum of its proper divisors (10943074).

20255966 is a wasteful number, since it uses less digits than its factorization.

20255966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 20255966 is about 4500.6628400714. The cubic root of 20255966 is about 272.5948540532.

The spelling of 20255966 in words is "twenty million, two hundred fifty-five thousand, nine hundred sixty-six".