820541930 has 32 divisors (see below), whose sum is σ = 1596526848. Its totient is φ = 301838400.

The previous prime is 820541899. The next prime is 820541963. The reversal of 820541930 is 39145028.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23585 + ... + 46875.

It is an arithmetic number, because the mean of its divisors is an integer number (49891464).

Almost surely, 2^820541930 is an apocalyptic number.

820541930 is a deficient number, since it is larger than the sum of its proper divisors (775984918).

820541930 is a wasteful number, since it uses less digits than its factorization.

820541930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23582.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 820541930 is about 28645.1030719039. The cubic root of 820541930 is about 936.1963124955.

Adding to 820541930 its reverse (39145028), we get a palindrome (859686958).

The spelling of 820541930 in words is "eight hundred twenty million, five hundred forty-one thousand, nine hundred thirty".