20142256 has 20 divisors (see below), whose sum is σ = 39100672. Its totient is φ = 10051776.

The previous prime is 20142253. The next prime is 20142257. The reversal of 20142256 is 65224102.

It is not an unprimeable number, because it can be changed into a prime (20142251) by changing a digit.

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, 11281 + ... + 12943.

Almost surely, 2^20142256 is an apocalyptic number.

It is an amenable number.

20142256 is a deficient number, since it is larger than the sum of its proper divisors (18958416).

20142256 is a wasteful number, since it uses less digits than its factorization.

20142256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428 (or 2422 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20142256 is about 4488.0124777010. The cubic root of 20142256 is about 272.0838121190.

Adding to 20142256 its reverse (65224102), we get a palindrome (85366358).

The spelling of 20142256 in words is "twenty million, one hundred forty-two thousand, two hundred fifty-six".