20330496 has 72 divisors (see below), whose sum is σ = 58771440. Its totient is φ = 6770688.

The previous prime is 20330491. The next prime is 20330503. The reversal of 20330496 is 69403302.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20330491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17881 + ... + 18983.

It is an arithmetic number, because the mean of its divisors is an integer number (816270).

Almost surely, 2^20330496 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 20330496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29385720).

20330496 is an abundant number, since it is smaller than the sum of its proper divisors (38440944).

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

20330496 is a wasteful number, since it uses less digits than its factorization.

20330496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131 (or 1108 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 20330496 is about 4508.9351292739. The cubic root of 20330496 is about 272.9287742377.

Adding to 20330496 its reverse (69403302), we get a palindrome (89733798).

The spelling of 20330496 in words is "twenty million, three hundred thirty thousand, four hundred ninety-six".