20417960 has 16 divisors (see below), whose sum is σ = 45940500. Its totient is φ = 8167168.

The previous prime is 20417939. The next prime is 20417963. The reversal of 20417960 is 6971402.

It can be written as a sum of positive squares in 2 ways, for example, as 20124196 + 293764 = 4486^2 + 542^2 .

It is not an unprimeable number, because it can be changed into a prime (20417963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255185 + ... + 255264.

Almost surely, 2^20417960 is an apocalyptic number.

20417960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20417960 is an abundant number, since it is smaller than the sum of its proper divisors (25522540).

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

20417960 is a wasteful number, since it uses less digits than its factorization.

20417960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510460 (or 510456 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 20417960 is about 4518.6236842649. The cubic root of 20417960 is about 273.3196040430.

It can be divided in two parts, 2041 and 7960, that added together give a palindrome (10001).

The spelling of 20417960 in words is "twenty million, four hundred seventeen thousand, nine hundred sixty".