20107776 has 160 divisors (see below), whose sum is σ = 61871040. Its totient is φ = 5750784.

The previous prime is 20107771. The next prime is 20107807. The reversal of 20107776 is 67770102.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20107771) 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, 379366 + ... + 379418.

It is an arithmetic number, because the mean of its divisors is an integer number (386694).

Almost surely, 2^20107776 is an apocalyptic number.

20107776 is a gapful number since it is divisible by the number (26) 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 20107776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30935520).

20107776 is an abundant number, since it is smaller than the sum of its proper divisors (41763264).

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

20107776 is a wasteful number, since it uses less digits than its factorization.

20107776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 4116, while the sum is 30.

The square root of 20107776 is about 4484.1694883222. The cubic root of 20107776 is about 271.9284702336.

Adding to 20107776 its reverse (67770102), we get a palindrome (87877878).

The spelling of 20107776 in words is "twenty million, one hundred seven thousand, seven hundred seventy-six".