20344856 has 32 divisors (see below), whose sum is σ = 44664480. Its totient is φ = 8505600.

The previous prime is 20344853. The next prime is 20344871. The reversal of 20344856 is 65844302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2135 + ... + 6726.

It is an arithmetic number, because the mean of its divisors is an integer number (1395765).

Almost surely, 2^20344856 is an apocalyptic number.

It is an amenable number.

20344856 is an abundant number, since it is smaller than the sum of its proper divisors (24319624).

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

20344856 is a wasteful number, since it uses less digits than its factorization.

20344856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8915 (or 8911 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 20344856 is about 4510.5272419086. The cubic root of 20344856 is about 272.9930181991.

The spelling of 20344856 in words is "twenty million, three hundred forty-four thousand, eight hundred fifty-six".