20255766 has 8 divisors (see below), whose sum is σ = 40511544. Its totient is φ = 6751920.

The previous prime is 20255743. The next prime is 20255771. The reversal of 20255766 is 66755202.

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

20255766 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1687975 + ... + 1687986.

It is an arithmetic number, because the mean of its divisors is an integer number (5063943).

Almost surely, 2^20255766 is an apocalyptic number.

20255766 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.

20255766 is a wasteful number, since it uses less digits than its factorization.

20255766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375966.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 20255766 is about 4500.6406210672. The cubic root of 20255766 is about 272.5939568829.

The spelling of 20255766 in words is "twenty million, two hundred fifty-five thousand, seven hundred sixty-six".