820026807810 has 64 divisors (see below), whose sum is σ = 2347008417792. Its totient is φ = 179285363136.

The previous prime is 820026807793. The next prime is 820026807823. The reversal of 820026807810 is 18708620028.

It is a super-2 number, since 2×820026807810² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84884074 + ... + 84893733.

It is an arithmetic number, because the mean of its divisors is an integer number (36672006528).

Almost surely, 2^820026807810 is an apocalyptic number.

820026807810 is an abundant number, since it is smaller than the sum of its proper divisors (1526981609982).

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

820026807810 is a wasteful number, since it uses less digits than its factorization.

820026807810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169777847.

The product of its (nonzero) digits is 86016, while the sum is 42.

The spelling of 820026807810 in words is "eight hundred twenty billion, twenty-six million, eight hundred seven thousand, eight hundred ten".