20711160 has 128 divisors (see below), whose sum is σ = 70041600. Its totient is φ = 5443200.

The previous prime is 20711143. The next prime is 20711167. The reversal of 20711160 is 6111702.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20711167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137085 + ... + 137235.

It is an arithmetic number, because the mean of its divisors is an integer number (547200).

Almost surely, 2^20711160 is an apocalyptic number.

20711160 is a gapful number since it is divisible by the number (20) 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 20711160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35020800).

20711160 is an abundant number, since it is smaller than the sum of its proper divisors (49330440).

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

20711160 is a wasteful number, since it uses less digits than its factorization.

20711160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 20711160 is about 4550.9515488522. The cubic root of 20711160 is about 274.6216725975.

Adding to 20711160 its reverse (6111702), we get a palindrome (26822862).

The spelling of 20711160 in words is "twenty million, seven hundred eleven thousand, one hundred sixty".