20430105 has 32 divisors (see below), whose sum is σ = 33948288. Its totient is φ = 10483200.

The previous prime is 20430083. The next prime is 20430121. The reversal of 20430105 is 50103402.

It is not a de Polignac number, because 20430105 - 2⁶ = 20430041 is a prime.

It is a super-2 number, since 2×20430105² = 834778380622050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 72565 + ... + 72845.

It is an arithmetic number, because the mean of its divisors is an integer number (1060884).

Almost surely, 2^20430105 is an apocalyptic number.

It is an amenable number.

20430105 is a deficient number, since it is larger than the sum of its proper divisors (13518183).

20430105 is a wasteful number, since it uses less digits than its factorization.

20430105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20430105 is about 4519.9673671388. The cubic root of 20430105 is about 273.3737852418.

Adding to 20430105 its reverse (50103402), we get a palindrome (70533507).

The spelling of 20430105 in words is "twenty million, four hundred thirty thousand, one hundred five".