20120855104 has 189 divisors, whose sum is σ = 49672258923. Its totient is φ = 8061505536.

The previous prime is 20120855077. The next prime is 20120855143. The reversal of 20120855104 is 40155802102.

The square root of 20120855104 is 141848.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 395214400 + 19725640704 = 19880^2 + 140448^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 135039222 + ... + 135039370.

Almost surely, 2^20120855104 is an apocalyptic number.

20120855104 is the 141848-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20120855104

20120855104 is an abundant number, since it is smaller than the sum of its proper divisors (29551403819).

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

20120855104 is an equidigital number, since it uses as much as digits as its factorization.

20120855104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The spelling of 20120855104 in words is "twenty billion, one hundred twenty million, eight hundred fifty-five thousand, one hundred four".