20091230 has 16 divisors (see below), whose sum is σ = 37047024. Its totient is φ = 7840320.

The previous prime is 20091179. The next prime is 20091233. The reversal of 20091230 is 3219002.

It is a junction number, because it is equal to n+sod(n) for n = 20091199 and 20091208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20091233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24092 + ... + 24911.

It is an arithmetic number, because the mean of its divisors is an integer number (2315439).

Almost surely, 2^20091230 is an apocalyptic number.

20091230 is a deficient number, since it is larger than the sum of its proper divisors (16955794).

20091230 is a wasteful number, since it uses less digits than its factorization.

20091230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49051.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 20091230 is about 4482.3241739080. The cubic root of 20091230 is about 271.8538628919.

The spelling of 20091230 in words is "twenty million, ninety-one thousand, two hundred thirty".