20926256 has 60 divisors (see below), whose sum is σ = 44930160. Its totient is φ = 9434880.

The previous prime is 20926237. The next prime is 20926259. The reversal of 20926256 is 65262902.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20926259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191930 + ... + 192038.

It is an arithmetic number, because the mean of its divisors is an integer number (748836).

Almost surely, 2^20926256 is an apocalyptic number.

20926256 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20926256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22465080).

20926256 is an abundant number, since it is smaller than the sum of its proper divisors (24003904).

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

20926256 is a wasteful number, since it uses less digits than its factorization.

20926256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 20926256 is about 4574.5224887413. The cubic root of 20926256 is about 275.5690958583.

The spelling of 20926256 in words is "twenty million, nine hundred twenty-six thousand, two hundred fifty-six".