20417460 has 96 divisors (see below), whose sum is σ = 65947392. Its totient is φ = 4623360.

The previous prime is 20417447. The next prime is 20417473. The reversal of 20417460 is 6471402.

It is an interprime number because it is at equal distance from previous prime (20417447) and next prime (20417473).

It is a self number, because there is not a number n which added to its sum of digits gives 20417460.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72520 + ... + 72800.

It is an arithmetic number, because the mean of its divisors is an integer number (686952).

Almost surely, 2^20417460 is an apocalyptic number.

20417460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20417460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32973696).

20417460 is an abundant number, since it is smaller than the sum of its proper divisors (45529932).

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

20417460 is a wasteful number, since it uses less digits than its factorization.

20417460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20417460 is about 4518.5683573451. The cubic root of 20417460 is about 273.3173729857.

Adding to 20417460 its reverse (6471402), we get a palindrome (26888862).

The spelling of 20417460 in words is "twenty million, four hundred seventeen thousand, four hundred sixty".