20641350 has 96 divisors (see below), whose sum is σ = 55425024. Its totient is φ = 5068800.

The previous prime is 20641343. The next prime is 20641351. The reversal of 20641350 is 5314602.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20641351) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 106854 + ... + 107046.

It is an arithmetic number, because the mean of its divisors is an integer number (577344).

Almost surely, 2^20641350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20641350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27712512).

20641350 is an abundant number, since it is smaller than the sum of its proper divisors (34783674).

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

20641350 is a wasteful number, since it uses less digits than its factorization.

20641350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20641350 is about 4543.2752503013. The cubic root of 20641350 is about 274.3127744105.

Adding to 20641350 its reverse (5314602), we get a palindrome (25955952).

The spelling of 20641350 in words is "twenty million, six hundred forty-one thousand, three hundred fifty".