20403160 has 16 divisors (see below), whose sum is σ = 45907200. Its totient is φ = 8161248.

The previous prime is 20403151. The next prime is 20403181. The reversal of 20403160 is 6130402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255000 + ... + 255079.

It is an arithmetic number, because the mean of its divisors is an integer number (2869200).

Almost surely, 2^20403160 is an apocalyptic number.

20403160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20403160 is an abundant number, since it is smaller than the sum of its proper divisors (25504040).

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

20403160 is a wasteful number, since it uses less digits than its factorization.

20403160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510090 (or 510086 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20403160 is about 4516.9857205885. The cubic root of 20403160 is about 273.2535493228.

Adding to 20403160 its reverse (6130402), we get a palindrome (26533562).

The spelling of 20403160 in words is "twenty million, four hundred three thousand, one hundred sixty".