20120223120 has 80 divisors (see below), whose sum is σ = 62528533632. Its totient is φ = 5351987200.

The previous prime is 20120223089. The next prime is 20120223121. The reversal of 20120223120 is 2132202102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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 20120223120.

It is not an unprimeable number, because it can be changed into a prime (20120223121) 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, 8292 + ... + 200771.

Almost surely, 2^20120223120 is an apocalyptic number.

20120223120 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 20120223120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31264266816).

20120223120 is an abundant number, since it is smaller than the sum of its proper divisors (42408310512).

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

20120223120 is a wasteful number, since it uses less digits than its factorization.

20120223120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209480 (or 209474 counting only the distinct ones).

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

Adding to 20120223120 its reverse (2132202102), we get a palindrome (22252425222).

The spelling of 20120223120 in words is "twenty billion, one hundred twenty million, two hundred twenty-three thousand, one hundred twenty".