20243256 has 32 divisors (see below), whose sum is σ = 55209600. Its totient is φ = 6134240.

The previous prime is 20243233. The next prime is 20243263. The reversal of 20243256 is 65234202.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 38076 + ... + 38603.

It is an arithmetic number, because the mean of its divisors is an integer number (1725300).

Almost surely, 2^20243256 is an apocalyptic number.

It is an amenable number.

20243256 is an abundant number, since it is smaller than the sum of its proper divisors (34966344).

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

20243256 is a wasteful number, since it uses less digits than its factorization.

20243256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76699 (or 76695 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 20243256 is about 4499.2506042673. The cubic root of 20243256 is about 272.5378271422.

Adding to 20243256 its reverse (65234202), we get a palindrome (85477458).

The spelling of 20243256 in words is "twenty million, two hundred forty-three thousand, two hundred fifty-six".