20611120 has 20 divisors (see below), whose sum is σ = 47921040. Its totient is φ = 8244416.

The previous prime is 20611111. The next prime is 20611127. The reversal of 20611120 is 2111602.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 20611120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20611127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128740 + ... + 128899.

It is an arithmetic number, because the mean of its divisors is an integer number (2396052).

Almost surely, 2^20611120 is an apocalyptic number.

20611120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20611120 is an abundant number, since it is smaller than the sum of its proper divisors (27309920).

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

20611120 is a wasteful number, since it uses less digits than its factorization.

20611120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257652 (or 257646 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 20611120 is about 4539.9471362561. The cubic root of 20611120 is about 274.1787953397.

Adding to 20611120 its reverse (2111602), we get a palindrome (22722722).

The spelling of 20611120 in words is "twenty million, six hundred eleven thousand, one hundred twenty".