20313180 has 60 divisors (see below), whose sum is σ = 63728280. Its totient is φ = 5416416.

The previous prime is 20313143. The next prime is 20313197. The reversal of 20313180 is 8131302.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4650 + ... + 7889.

It is an arithmetic number, because the mean of its divisors is an integer number (1062138).

Almost surely, 2^20313180 is an apocalyptic number.

20313180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20313180 is an abundant number, since it is smaller than the sum of its proper divisors (43415100).

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

20313180 is a wasteful number, since it uses less digits than its factorization.

20313180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12560 (or 12549 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 20313180 is about 4507.0145329253. The cubic root of 20313180 is about 272.8512654376.

Adding to 20313180 its reverse (8131302), we get a palindrome (28444482).

The spelling of 20313180 in words is "twenty million, three hundred thirteen thousand, one hundred eighty".