20163140 has 12 divisors (see below), whose sum is σ = 42342636. Its totient is φ = 8065248.

The previous prime is 20163137. The next prime is 20163151. The reversal of 20163140 is 4136102.

It can be written as a sum of positive squares in 2 ways, for example, as 12222016 + 7941124 = 3496^2 + 2818^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504059 + ... + 504098.

It is an arithmetic number, because the mean of its divisors is an integer number (3528553).

Almost surely, 2^20163140 is an apocalyptic number.

20163140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20163140 is an abundant number, since it is smaller than the sum of its proper divisors (22179496).

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

20163140 is a wasteful number, since it uses less digits than its factorization.

20163140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008166 (or 1008164 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 20163140 is about 4490.3385173058. The cubic root of 20163140 is about 272.1778140959.

Adding to 20163140 its reverse (4136102), we get a palindrome (24299242).

The spelling of 20163140 in words is "twenty million, one hundred sixty-three thousand, one hundred forty".