20215551504160 has 192 divisors, whose sum is σ = 52778173819392. Its totient is φ = 7278158626816.

The previous prime is 20215551504157. The next prime is 20215551504167. The reversal of 20215551504160 is 6140515551202.

It is not an unprimeable number, because it can be changed into a prime (20215551504167) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 327595869 + ... + 327657571.

It is an arithmetic number, because the mean of its divisors is an integer number (274886321976).

Almost surely, 2^{20215551504160} is an apocalyptic number.

20215551504160 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 20215551504160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26389086909696).

20215551504160 is an abundant number, since it is smaller than the sum of its proper divisors (32562622315232).

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

20215551504160 is a wasteful number, since it uses less digits than its factorization.

20215551504160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66995 (or 66987 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 37.

The spelling of 20215551504160 in words is "twenty trillion, two hundred fifteen billion, five hundred fifty-one million, five hundred four thousand, one hundred sixty".