20381230 has 8 divisors (see below), whose sum is σ = 36686232. Its totient is φ = 8152488.

The previous prime is 20381219. The next prime is 20381237. The reversal of 20381230 is 3218302.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 20381198 and 20381207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20381237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1019052 + ... + 1019071.

It is an arithmetic number, because the mean of its divisors is an integer number (4585779).

Almost surely, 2^20381230 is an apocalyptic number.

20381230 is a deficient number, since it is larger than the sum of its proper divisors (16305002).

20381230 is a wasteful number, since it uses less digits than its factorization.

20381230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038130.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20381230 is about 4514.5575641473. The cubic root of 20381230 is about 273.1556135360.

Adding to 20381230 its reverse (3218302), we get a palindrome (23599532).

The spelling of 20381230 in words is "twenty million, three hundred eighty-one thousand, two hundred thirty".