20057544 has 80 divisors (see below), whose sum is σ = 60526620. Its totient is φ = 6168960.

The previous prime is 20057539. The next prime is 20057549. The reversal of 20057544 is 44575002.

It is an interprime number because it is at equal distance from previous prime (20057539) and next prime (20057549).

It can be written as a sum of positive squares in 2 ways, for example, as 14152644 + 5904900 = 3762^2 + 2430^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20057549) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7234 + ... + 9614.

Almost surely, 2^20057544 is an apocalyptic number.

20057544 is a gapful number since it is divisible by the number (24) 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 20057544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30263310).

20057544 is an abundant number, since it is smaller than the sum of its proper divisors (40469076).

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

20057544 is a wasteful number, since it uses less digits than its factorization.

20057544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412 (or 2399 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 20057544 is about 4478.5649487308. The cubic root of 20057544 is about 271.7018431288.

The spelling of 20057544 in words is "twenty million, fifty-seven thousand, five hundred forty-four".