20215355551300 has 288 divisors, whose sum is σ = 55230833000448. Its totient is φ = 6251306734080.

The previous prime is 20215355551241. The next prime is 20215355551309. The reversal of 20215355551300 is 315555351202.

It is a self number, because there is not a number n which added to its sum of digits gives 20215355551300.

It is not an unprimeable number, because it can be changed into a prime (20215355551309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 259574967 + ... + 259652833.

It is an arithmetic number, because the mean of its divisors is an integer number (191773725696).

Almost surely, 2^{20215355551300} is an apocalyptic number.

20215355551300 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 20215355551300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27615416500224).

20215355551300 is an abundant number, since it is smaller than the sum of its proper divisors (35015477449148).

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

20215355551300 is a wasteful number, since it uses less digits than its factorization.

20215355551300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78555 (or 78548 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 37.

The spelling of 20215355551300 in words is "twenty trillion, two hundred fifteen billion, three hundred fifty-five million, five hundred fifty-one thousand, three hundred".