820210286885 has 16 divisors (see below), whose sum is σ = 1074479221440. Its totient is φ = 596100243840.

The previous prime is 820210286879. The next prime is 820210286887. The reversal of 820210286885 is 588682012028.

It is not a de Polignac number, because 820210286885 - 2⁴ = 820210286869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820210286887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5124575 + ... + 5282204.

It is an arithmetic number, because the mean of its divisors is an integer number (67154951340).

Almost surely, 2^820210286885 is an apocalyptic number.

It is an amenable number.

820210286885 is a deficient number, since it is larger than the sum of its proper divisors (254268934555).

820210286885 is a wasteful number, since it uses less digits than its factorization.

820210286885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10408228.

The product of its (nonzero) digits is 983040, while the sum is 50.

The spelling of 820210286885 in words is "eight hundred twenty billion, two hundred ten million, two hundred eighty-six thousand, eight hundred eighty-five".