20122215204 has 96 divisors (see below), whose sum is σ = 57913139200. Its totient is φ = 5295362688.

The previous prime is 20122215163. The next prime is 20122215247. The reversal of 20122215204 is 40251222102.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 485697 + ... + 525495.

Almost surely, 2^20122215204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20122215204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28956569600).

20122215204 is an abundant number, since it is smaller than the sum of its proper divisors (37790923996).

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

20122215204 is a wasteful number, since it uses less digits than its factorization.

20122215204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40289 (or 40287 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 20122215204 its reverse (40251222102), we get a palindrome (60373437306).

The spelling of 20122215204 in words is "twenty billion, one hundred twenty-two million, two hundred fifteen thousand, two hundred four".