20417480 has 32 divisors (see below), whose sum is σ = 46103040. Its totient is φ = 8137920.

The previous prime is 20417473. The next prime is 20417483. The reversal of 20417480 is 8471402.

It is not an unprimeable number, because it can be changed into a prime (20417483) 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 7 ways as a sum of consecutive naturals, for example, 13145 + ... + 14615.

It is an arithmetic number, because the mean of its divisors is an integer number (1440720).

Almost surely, 2^20417480 is an apocalyptic number.

20417480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20417480 is an abundant number, since it is smaller than the sum of its proper divisors (25685560).

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

20417480 is a wasteful number, since it uses less digits than its factorization.

20417480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829 (or 1825 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 20417480 is about 4518.5705704349. The cubic root of 20417480 is about 273.3174622287.

Adding to 20417480 its reverse (8471402), we get a palindrome (28888882).

The spelling of 20417480 in words is "twenty million, four hundred seventeen thousand, four hundred eighty".