20417424 has 20 divisors (see below), whose sum is σ = 52745136. Its totient is φ = 6805792.

The previous prime is 20417417. The next prime is 20417429. The reversal of 20417424 is 42471402.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 20417394 and 20417403.

It is not an unprimeable number, because it can be changed into a prime (20417429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212634 + ... + 212729.

Almost surely, 2^20417424 is an apocalyptic number.

20417424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20417424 is an abundant number, since it is smaller than the sum of its proper divisors (32327712).

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

20417424 is a wasteful number, since it uses less digits than its factorization.

20417424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425374 (or 425368 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 20417424 is about 4518.5643737807. The cubic root of 20417424 is about 273.3172123482.

Adding to 20417424 its reverse (42471402), we get a palindrome (62888826).

The spelling of 20417424 in words is "twenty million, four hundred seventeen thousand, four hundred twenty-four".