20112321210 has 32 divisors (see below), whose sum is σ = 48313651392. Its totient is φ = 5358387840.

The previous prime is 20112321167. The next prime is 20112321211. The reversal of 20112321210 is 1212321102.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20112321210.

It is not an unprimeable number, because it can be changed into a prime (20112321211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272656 + ... + 338475.

It is an arithmetic number, because the mean of its divisors is an integer number (1509801606).

Almost surely, 2^20112321210 is an apocalyptic number.

20112321210 is an abundant number, since it is smaller than the sum of its proper divisors (28201330182).

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

20112321210 is a wasteful number, since it uses less digits than its factorization.

20112321210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612238.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20112321210 its reverse (1212321102), we get a palindrome (21324642312).

The spelling of 20112321210 in words is "twenty billion, one hundred twelve million, three hundred twenty-one thousand, two hundred ten".