20057312 has 48 divisors (see below), whose sum is σ = 45360000. Its totient is φ = 8634240.

The previous prime is 20057291. The next prime is 20057347. The reversal of 20057312 is 21375002.

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, 5189 + ... + 8187.

It is an arithmetic number, because the mean of its divisors is an integer number (945000).

Almost surely, 2^20057312 is an apocalyptic number.

20057312 is a gapful number since it is divisible by the number (22) 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 20057312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22680000).

20057312 is an abundant number, since it is smaller than the sum of its proper divisors (25302688).

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

20057312 is a wasteful number, since it uses less digits than its factorization.

20057312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3039 (or 3031 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20057312 is about 4478.5390475020. The cubic root of 20057312 is about 271.7007955584.

The spelling of 20057312 in words is "twenty million, fifty-seven thousand, three hundred twelve".