20415430 has 16 divisors (see below), whose sum is σ = 41997600. Its totient is φ = 6999552.

The previous prime is 20415401. The next prime is 20415431. The reversal of 20415430 is 3451402.

It is a junction number, because it is equal to n+sod(n) for n = 20415398 and 20415407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20415431) 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, 145755 + ... + 145894.

It is an arithmetic number, because the mean of its divisors is an integer number (2624850).

Almost surely, 2^20415430 is an apocalyptic number.

20415430 is an abundant number, since it is smaller than the sum of its proper divisors (21582170).

20415430 is a wasteful number, since it uses less digits than its factorization.

20415430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291663.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20415430 is about 4518.3437230915. The cubic root of 20415430 is about 273.3083145188.

Adding to 20415430 its reverse (3451402), we get a palindrome (23866832).

The spelling of 20415430 in words is "twenty million, four hundred fifteen thousand, four hundred thirty".