20421230 has 8 divisors (see below), whose sum is σ = 36758232. Its totient is φ = 8168488.

The previous prime is 20421229. The next prime is 20421241. The reversal of 20421230 is 3212402.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021052 + ... + 1021071.

It is an arithmetic number, because the mean of its divisors is an integer number (4594779).

Almost surely, 2^20421230 is an apocalyptic number.

20421230 is a deficient number, since it is larger than the sum of its proper divisors (16337002).

20421230 is a wasteful number, since it uses less digits than its factorization.

20421230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042130.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20421230 is about 4518.9855056196. The cubic root of 20421230 is about 273.3341942600.

Adding to 20421230 its reverse (3212402), we get a palindrome (23633632).

The spelling of 20421230 in words is "twenty million, four hundred twenty-one thousand, two hundred thirty".