820159420 has 12 divisors (see below), whose sum is σ = 1722334824. Its totient is φ = 328063760.

The previous prime is 820159409. The next prime is 820159421. The reversal of 820159420 is 24951028.

820159420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×820159420² = 1345322948429472800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820159421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20503966 + ... + 20504005.

It is an arithmetic number, because the mean of its divisors is an integer number (143527902).

Almost surely, 2^820159420 is an apocalyptic number.

It is an amenable number.

820159420 is an abundant number, since it is smaller than the sum of its proper divisors (902175404).

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

820159420 is a wasteful number, since it uses less digits than its factorization.

820159420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41007980 (or 41007978 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 820159420 is about 28638.4255852168. The cubic root of 820159420 is about 936.0508151120.

The spelling of 820159420 in words is "eight hundred twenty million, one hundred fifty-nine thousand, four hundred twenty".