820820827126 has 4 divisors (see below), whose sum is σ = 1231231240692. Its totient is φ = 410410413562.

The previous prime is 820820827121. The next prime is 820820827129. The reversal of 820820827126 is 621728028028.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820820827121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205205206780 + ... + 205205206783.

It is an arithmetic number, because the mean of its divisors is an integer number (307807810173).

Almost surely, 2^820820827126 is an apocalyptic number.

820820827126 is a deficient number, since it is larger than the sum of its proper divisors (410410413566).

820820827126 is a wasteful number, since it uses less digits than its factorization.

820820827126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410410413565.

The product of its (nonzero) digits is 344064, while the sum is 46.

The spelling of 820820827126 in words is "eight hundred twenty billion, eight hundred twenty million, eight hundred twenty-seven thousand, one hundred twenty-six".