20440650 has 96 divisors (see below), whose sum is σ = 54282240. Its totient is φ = 5080320.

The previous prime is 20440649. The next prime is 20440691. The reversal of 20440650 is 5604402.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 160887 + ... + 161013.

It is an arithmetic number, because the mean of its divisors is an integer number (565440).

Almost surely, 2^20440650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20440650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27141120).

20440650 is an abundant number, since it is smaller than the sum of its proper divisors (33841590).

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

20440650 is a wasteful number, since it uses less digits than its factorization.

20440650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20440650 is about 4521.1337073792. The cubic root of 20440650 is about 273.4208111175.

The spelling of 20440650 in words is "twenty million, four hundred forty thousand, six hundred fifty".