20111230 has 8 divisors (see below), whose sum is σ = 36200232. Its totient is φ = 8044488.

The previous prime is 20111213. The next prime is 20111243. The reversal of 20111230 is 3211102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20111230² = 808923144225800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 2011123 = 20111230 / (2 + 0 + 1 + 1 + 1 + 2 + 3 + 0).

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 3 ways as a sum of consecutive naturals, for example, 1005552 + ... + 1005571.

It is an arithmetic number, because the mean of its divisors is an integer number (4525029).

Almost surely, 2^20111230 is an apocalyptic number.

20111230 is a deficient number, since it is larger than the sum of its proper divisors (16089002).

20111230 is a wasteful number, since it uses less digits than its factorization.

20111230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011130.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 20111230 is about 4484.5546044173. The cubic root of 20111230 is about 271.9440394536.

Adding to 20111230 its reverse (3211102), we get a palindrome (23322332).

The spelling of 20111230 in words is "twenty million, one hundred eleven thousand, two hundred thirty".