215205114020 has 96 divisors (see below), whose sum is σ = 499412390400. Its totient is φ = 77390576640.

The previous prime is 215205113987. The next prime is 215205114023. The reversal of 215205114020 is 20411502512.

It is a super-2 number, since 2×215205114020² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (215205114023) 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 31 ways as a sum of consecutive naturals, for example, 6368489 + ... + 6402191.

It is an arithmetic number, because the mean of its divisors is an integer number (5202212400).

Almost surely, 2^215205114020 is an apocalyptic number.

215205114020 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 215205114020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249706195200).

215205114020 is an abundant number, since it is smaller than the sum of its proper divisors (284207276380).

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

215205114020 is a wasteful number, since it uses less digits than its factorization.

215205114020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34365 (or 34363 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 215205114020 its reverse (20411502512), we get a palindrome (235616616532).

The spelling of 215205114020 in words is "two hundred fifteen billion, two hundred five million, one hundred fourteen thousand, twenty".