820220888142 has 24 divisors (see below), whose sum is σ = 1810676302344. Its totient is φ = 268248340464.

The previous prime is 820220888141. The next prime is 820220888153. The reversal of 820220888142 is 241888022028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820220888141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 429884208 + ... + 429886115.

It is an arithmetic number, because the mean of its divisors is an integer number (75444845931).

Almost surely, 2^820220888142 is an apocalyptic number.

820220888142 is an abundant number, since it is smaller than the sum of its proper divisors (990455414202).

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

820220888142 is a wasteful number, since it uses less digits than its factorization.

820220888142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859770384 (or 859770381 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 45.

The spelling of 820220888142 in words is "eight hundred twenty billion, two hundred twenty million, eight hundred eighty-eight thousand, one hundred forty-two".