20205455350170 has 256 divisors, whose sum is σ = 51832815390720. Its totient is φ = 5026447411200.

The previous prime is 20205455350057. The next prime is 20205455350259. The reversal of 20205455350170 is 7105355450202.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 13372239715 + ... + 13372241225.

It is an arithmetic number, because the mean of its divisors is an integer number (202471935120).

Almost surely, 2^{20205455350170} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20205455350170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25916407695360).

20205455350170 is an abundant number, since it is smaller than the sum of its proper divisors (31627360040550).

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

20205455350170 is a wasteful number, since it uses less digits than its factorization.

20205455350170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821.

The product of its (nonzero) digits is 210000, while the sum is 39.

The spelling of 20205455350170 in words is "twenty trillion, two hundred five billion, four hundred fifty-five million, three hundred fifty thousand, one hundred seventy".