20430111 has 32 divisors (see below), whose sum is σ = 31360000. Its totient is φ = 11726208.

The previous prime is 20430083. The next prime is 20430121. The reversal of 20430111 is 11103402.

It is a happy number.

It is not a de Polignac number, because 20430111 - 2⁵ = 20430079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20430121) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 58365 + ... + 58713.

It is an arithmetic number, because the mean of its divisors is an integer number (980000).

Almost surely, 2^20430111 is an apocalyptic number.

20430111 is a deficient number, since it is larger than the sum of its proper divisors (10929889).

20430111 is a wasteful number, since it uses less digits than its factorization.

20430111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20430111 is about 4519.9680308604. The cubic root of 20430111 is about 273.3738120037.

Adding to 20430111 its reverse (11103402), we get a palindrome (31533513).

The spelling of 20430111 in words is "twenty million, four hundred thirty thousand, one hundred eleven".