20120274720 has 1152 divisors, whose sum is σ = 90667745280. Its totient is φ = 4075868160.

The previous prime is 20120274701. The next prime is 20120274737. The reversal of 20120274720 is 2747202102.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 158427297 + ... + 158427423.

It is an arithmetic number, because the mean of its divisors is an integer number (78704640).

Almost surely, 2^20120274720 is an apocalyptic number.

20120274720 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 20120274720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45333872640).

20120274720 is an abundant number, since it is smaller than the sum of its proper divisors (70547470560).

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

20120274720 is a wasteful number, since it uses less digits than its factorization.

20120274720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

Adding to 20120274720 its reverse (2747202102), we get a palindrome (22867476822).

The spelling of 20120274720 in words is "twenty billion, one hundred twenty million, two hundred seventy-four thousand, seven hundred twenty".