20012213220 has 48 divisors (see below), whose sum is σ = 58983368640. Its totient is φ = 5055716736.

The previous prime is 20012213219. The next prime is 20012213227. The reversal of 20012213220 is 2231221002.

It is a happy number.

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 20012213220.

It is not an unprimeable number, because it can be changed into a prime (20012213227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8776147 + ... + 8778426.

It is an arithmetic number, because the mean of its divisors is an integer number (1228820180).

Almost surely, 2^20012213220 is an apocalyptic number.

20012213220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012213220 is an abundant number, since it is smaller than the sum of its proper divisors (38971155420).

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

20012213220 is a wasteful number, since it uses less digits than its factorization.

20012213220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17554604 (or 17554602 counting only the distinct ones).

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

Adding to 20012213220 its reverse (2231221002), we get a palindrome (22243434222).

The spelling of 20012213220 in words is "twenty billion, twelve million, two hundred thirteen thousand, two hundred twenty".