20905752 has 96 divisors (see below), whose sum is σ = 62996400. Its totient is φ = 5757696.

The previous prime is 20905751. The next prime is 20905771. The reversal of 20905752 is 25750902.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20905751) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33798 + ... + 34410.

Almost surely, 2^20905752 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 20905752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31498200).

20905752 is an abundant number, since it is smaller than the sum of its proper divisors (42090648).

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

20905752 is a wasteful number, since it uses less digits than its factorization.

20905752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 20905752 is about 4572.2808312701. The cubic root of 20905752 is about 275.4790635855.

The spelling of 20905752 in words is "twenty million, nine hundred five thousand, seven hundred fifty-two".