6820521474 has 16 divisors (see below), whose sum is σ = 14690354112. Its totient is φ = 2098621968.

The previous prime is 6820521467. The next prime is 6820521509. The reversal of 6820521474 is 4741250286.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43721214 + ... + 43721369.

It is an arithmetic number, because the mean of its divisors is an integer number (918147132).

Almost surely, 2^6820521474 is an apocalyptic number.

6820521474 is an abundant number, since it is smaller than the sum of its proper divisors (7869832638).

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

6820521474 is a wasteful number, since it uses less digits than its factorization.

6820521474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87442601.

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 6820521474 is about 82586.4484888411. The cubic root of 6820521474 is about 1896.4403781097.

The spelling of 6820521474 in words is "six billion, eight hundred twenty million, five hundred twenty-one thousand, four hundred seventy-four".