20254256 has 40 divisors (see below), whose sum is σ = 43141584. Its totient is φ = 9135360.

The previous prime is 20254249. The next prime is 20254277. The reversal of 20254256 is 65245202.

It is a super-2 number, since 2×20254256² = 820469772227072, which contains 22 as substring.

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, 27266 + ... + 27998.

Almost surely, 2^20254256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20254256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21570792).

20254256 is an abundant number, since it is smaller than the sum of its proper divisors (22887328).

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

20254256 is a wasteful number, since it uses less digits than its factorization.

20254256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909 (or 903 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 20254256 is about 4500.4728640444. The cubic root of 20254256 is about 272.5871830569.

Adding to 20254256 its reverse (65245202), we get a palindrome (85499458).

The spelling of 20254256 in words is "twenty million, two hundred fifty-four thousand, two hundred fifty-six".