20753744 has 40 divisors (see below), whose sum is σ = 45065568. Its totient is φ = 9175680.

The previous prime is 20753737. The next prime is 20753771. The reversal of 20753744 is 44735702.

It is a self number, because there is not a number n which added to its sum of digits gives 20753744.

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, 4919 + ... + 8105.

Almost surely, 2^20753744 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 20753744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22532784).

20753744 is an abundant number, since it is smaller than the sum of its proper divisors (24311824).

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

20753744 is a wasteful number, since it uses less digits than its factorization.

20753744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243 (or 3237 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 32.

The square root of 20753744 is about 4555.6277284256. The cubic root of 20753744 is about 274.8097593339.

The spelling of 20753744 in words is "twenty million, seven hundred fifty-three thousand, seven hundred forty-four".