20012223210 has 64 divisors (see below), whose sum is σ = 55126386432. Its totient is φ = 4554579456.

The previous prime is 20012223193. The next prime is 20012223221. The reversal of 20012223210 is 1232221002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20012223210.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155569 + ... + 253428.

It is an arithmetic number, because the mean of its divisors is an integer number (861349788).

Almost surely, 2^20012223210 is an apocalyptic number.

20012223210 is an abundant number, since it is smaller than the sum of its proper divisors (35114163222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20012223210 is a wasteful number, since it uses less digits than its factorization.

20012223210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409247.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20012223210 its reverse (1232221002), we get a palindrome (21244444212).

The spelling of 20012223210 in words is "twenty billion, twelve million, two hundred twenty-three thousand, two hundred ten".