20122200000 has 504 divisors, whose sum is σ = 82441535904. Its totient is φ = 4596480000.

The previous prime is 20122199989. The next prime is 20122200013. The reversal of 20122200000 is 222102.

It is a tau number, because it is divible by the number of its divisors (504).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 12599202 + ... + 12600798.

It is an arithmetic number, because the mean of its divisors is an integer number (163574476).

Almost surely, 2^20122200000 is an apocalyptic number.

20122200000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20122200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41220767952).

20122200000 is an abundant number, since it is smaller than the sum of its proper divisors (62319335904).

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

20122200000 is an equidigital number, since it uses as much as digits as its factorization.

20122200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647 (or 1614 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20122200000 its reverse (222102), we get a palindrome (20122422102).

The spelling of 20122200000 in words is "twenty billion, one hundred twenty-two million, two hundred thousand".