20427256 has 16 divisors (see below), whose sum is σ = 39336840. Its totient is φ = 9937440.

The previous prime is 20427247. The next prime is 20427257. The reversal of 20427256 is 65272402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20427257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34210 + ... + 34801.

Almost surely, 2^20427256 is an apocalyptic number.

It is an amenable number.

20427256 is a deficient number, since it is larger than the sum of its proper divisors (18909584).

20427256 is a wasteful number, since it uses less digits than its factorization.

20427256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69054 (or 69050 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 20427256 is about 4519.6521990082. The cubic root of 20427256 is about 273.3610772288.

Adding to 20427256 its reverse (65272402), we get a palindrome (85699658).

The spelling of 20427256 in words is "twenty million, four hundred twenty-seven thousand, two hundred fifty-six".