20819796 has 36 divisors (see below), whose sum is σ = 50336832. Its totient is φ = 6697376.

The previous prime is 20819791. The next prime is 20819797. The reversal of 20819796 is 69791802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20819791) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9061 + ... + 11123.

Almost surely, 2^20819796 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 20819796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25168416).

20819796 is an abundant number, since it is smaller than the sum of its proper divisors (29517036).

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

20819796 is a wasteful number, since it uses less digits than its factorization.

20819796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2128 (or 2097 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 20819796 is about 4562.8714643303. The cubic root of 20819796 is about 275.1009921078.

The spelling of 20819796 in words is "twenty million, eight hundred nineteen thousand, seven hundred ninety-six".