20650080 has 96 divisors (see below), whose sum is σ = 70979328. Its totient is φ = 5004800.

The previous prime is 20650057. The next prime is 20650081. The reversal of 20650080 is 8005602.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20650081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3325 + ... + 7235.

It is an arithmetic number, because the mean of its divisors is an integer number (739368).

Almost surely, 2^20650080 is an apocalyptic number.

20650080 is a gapful number since it is divisible by the number (20) 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 20650080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35489664).

20650080 is an abundant number, since it is smaller than the sum of its proper divisors (50329248).

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

20650080 is a wasteful number, since it uses less digits than its factorization.

20650080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3940 (or 3932 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20650080 is about 4544.2359093691. The cubic root of 20650080 is about 274.3514413418.

Adding to 20650080 its reverse (8005602), we get a palindrome (28655682).

The spelling of 20650080 in words is "twenty million, six hundred fifty thousand, eighty".