20430415 has 16 divisors (see below), whose sum is σ = 26056800. Its totient is φ = 15334272.

The previous prime is 20430409. The next prime is 20430439. The reversal of 20430415 is 51403402.

It is a cyclic number.

It is not a de Polignac number, because 20430415 - 2¹⁵ = 20397647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 20430392 and 20430401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9369 + ... + 11341.

It is an arithmetic number, because the mean of its divisors is an integer number (1628550).

Almost surely, 2^20430415 is an apocalyptic number.

20430415 is a deficient number, since it is larger than the sum of its proper divisors (5626385).

20430415 is a wasteful number, since it uses less digits than its factorization.

20430415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106.

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

The square root of 20430415 is about 4520.0016592917. The cubic root of 20430415 is about 273.3751679308.

Adding to 20430415 its reverse (51403402), we get a palindrome (71833817).

The spelling of 20430415 in words is "twenty million, four hundred thirty thousand, four hundred fifteen".