20820096 has 192 divisors, whose sum is σ = 68739840. Its totient is φ = 5990400.

The previous prime is 20820077. The next prime is 20820101. The reversal of 20820096 is 69002802.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 392806 + ... + 392858.

It is an arithmetic number, because the mean of its divisors is an integer number (358020).

Almost surely, 2^20820096 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 20820096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34369920).

20820096 is an abundant number, since it is smaller than the sum of its proper divisors (47919744).

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

20820096 is a wasteful number, since it uses less digits than its factorization.

20820096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 20820096 is about 4562.9043382477. The cubic root of 20820096 is about 275.1023134448.

Adding to 20820096 its reverse (69002802), we get a palindrome (89822898).

The spelling of 20820096 in words is "twenty million, eight hundred twenty thousand, ninety-six".