20417430 has 32 divisors (see below), whose sum is σ = 53457408. Its totient is φ = 4949600.

The previous prime is 20417429. The next prime is 20417447. The reversal of 20417430 is 3471402.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20417397 and 20417406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30606 + ... + 31265.

It is an arithmetic number, because the mean of its divisors is an integer number (1670544).

Almost surely, 2^20417430 is an apocalyptic number.

20417430 is an abundant number, since it is smaller than the sum of its proper divisors (33039978).

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

20417430 is a wasteful number, since it uses less digits than its factorization.

20417430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61892.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20417430 is about 4518.5650377083. The cubic root of 20417430 is about 273.3172391211.

Adding to 20417430 its reverse (3471402), we get a palindrome (23888832).

The spelling of 20417430 in words is "twenty million, four hundred seventeen thousand, four hundred thirty".