20451160 has 16 divisors (see below), whose sum is σ = 46015200. Its totient is φ = 8180448.

The previous prime is 20451131. The next prime is 20451181. The reversal of 20451160 is 6115402.

It is a congruent number.

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, 255600 + ... + 255679.

It is an arithmetic number, because the mean of its divisors is an integer number (2875950).

Almost surely, 2^20451160 is an apocalyptic number.

20451160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20451160 is an abundant number, since it is smaller than the sum of its proper divisors (25564040).

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

20451160 is a wasteful number, since it uses less digits than its factorization.

20451160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511290 (or 511286 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 20451160 is about 4522.2958770961. The cubic root of 20451160 is about 273.4676648191.

Adding to 20451160 its reverse (6115402), we get a palindrome (26566562).

The spelling of 20451160 in words is "twenty million, four hundred fifty-one thousand, one hundred sixty".