20421214210 has 16 divisors (see below), whose sum is σ = 36760464000. Its totient is φ = 8167979376.

The previous prime is 20421214189. The next prime is 20421214213. The reversal of 20421214210 is 1241212402.

It is not an unprimeable number, because it can be changed into a prime (20421214213) 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, 135991 + ... + 243589.

It is an arithmetic number, because the mean of its divisors is an integer number (2297529000).

Almost surely, 2^20421214210 is an apocalyptic number.

20421214210 is a deficient number, since it is larger than the sum of its proper divisors (16339249790).

20421214210 is a wasteful number, since it uses less digits than its factorization.

20421214210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126585.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20421214210 its reverse (1241212402), we get a palindrome (21662426612).

The spelling of 20421214210 in words is "twenty billion, four hundred twenty-one million, two hundred fourteen thousand, two hundred ten".