20123256 has 32 divisors (see below), whose sum is σ = 50878800. Its totient is φ = 6631680.

The previous prime is 20123239. The next prime is 20123263. The reversal of 20123256 is 65232102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2575 + ... + 6846.

Almost surely, 2^20123256 is an apocalyptic number.

It is an amenable number.

20123256 is an abundant number, since it is smaller than the sum of its proper divisors (30755544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20123256 is a wasteful number, since it uses less digits than its factorization.

20123256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9519 (or 9515 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20123256 is about 4485.8952283797. The cubic root of 20123256 is about 271.9982338409.

Adding to 20123256 its reverse (65232102), we get a palindrome (85355358).

The spelling of 20123256 in words is "twenty million, one hundred twenty-three thousand, two hundred fifty-six".