20611166120 has 16 divisors (see below), whose sum is σ = 46375123860. Its totient is φ = 8244466432.

The previous prime is 20611166119. The next prime is 20611166189. The reversal of 20611166120 is 2166111602.

It can be written as a sum of positive squares in 2 ways, for example, as 19163972356 + 1447193764 = 138434^2 + 38042^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20611166120.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257639537 + ... + 257639616.

Almost surely, 2^20611166120 is an apocalyptic number.

20611166120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20611166120 is an abundant number, since it is smaller than the sum of its proper divisors (25763957740).

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

20611166120 is a wasteful number, since it uses less digits than its factorization.

20611166120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515279164 (or 515279160 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 20611166120 its reverse (2166111602), we get a palindrome (22777277722).

The spelling of 20611166120 in words is "twenty billion, six hundred eleven million, one hundred sixty-six thousand, one hundred twenty".