20111696 has 40 divisors (see below), whose sum is σ = 42780000. Its totient is φ = 9083520.

The previous prime is 20111687. The next prime is 20111711. The reversal of 20111696 is 69611102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40055 + ... + 40553.

It is an arithmetic number, because the mean of its divisors is an integer number (1069500).

Almost surely, 2^20111696 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 20111696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21390000).

20111696 is an abundant number, since it is smaller than the sum of its proper divisors (22668304).

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

20111696 is a wasteful number, since it uses less digits than its factorization.

20111696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747 (or 741 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 20111696 is about 4484.6065602235. The cubic root of 20111696 is about 271.9461398546.

Adding to 20111696 its reverse (69611102), we get a palindrome (89722798).

The spelling of 20111696 in words is "twenty million, one hundred eleven thousand, six hundred ninety-six".