20115224120 has 16 divisors (see below), whose sum is σ = 45259254360. Its totient is φ = 8046089632.

The previous prime is 20115224119. The next prime is 20115224123. The reversal of 20115224120 is 2142251102.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20115224092 and 20115224101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20115224123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251440262 + ... + 251440341.

Almost surely, 2^20115224120 is an apocalyptic number.

20115224120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20115224120 is an abundant number, since it is smaller than the sum of its proper divisors (25144030240).

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

20115224120 is a wasteful number, since it uses less digits than its factorization.

20115224120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502880614 (or 502880610 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 20115224120 its reverse (2142251102), we get a palindrome (22257475222).

The spelling of 20115224120 in words is "twenty billion, one hundred fifteen million, two hundred twenty-four thousand, one hundred twenty".