20255142 has 8 divisors (see below), whose sum is σ = 40510296. Its totient is φ = 6751712.

The previous prime is 20255117. The next prime is 20255153. The reversal of 20255142 is 24155202.

It is a happy number.

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

20255142 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1687923 + ... + 1687934.

It is an arithmetic number, because the mean of its divisors is an integer number (5063787).

Almost surely, 2^20255142 is an apocalyptic number.

20255142 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.

20255142 is a wasteful number, since it uses less digits than its factorization.

20255142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3375862.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 20255142 is about 4500.5712970689. The cubic root of 20255142 is about 272.5911576738.

The spelling of 20255142 in words is "twenty million, two hundred fifty-five thousand, one hundred forty-two".