7700000020 has 24 divisors (see below), whose sum is σ = 16205095368. Its totient is φ = 3073315200.

The previous prime is 7700000017. The next prime is 7700000027. The reversal of 7700000020 is 200000077.

It can be written as a sum of positive squares in 4 ways, for example, as 883516176 + 6816483844 = 29724^2 + 82562^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7700000027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408351 + ... + 426790.

It is an arithmetic number, because the mean of its divisors is an integer number (675212307).

Almost surely, 2^7700000020 is an apocalyptic number.

It is an amenable number.

7700000020 is an abundant number, since it is smaller than the sum of its proper divisors (8505095348).

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

7700000020 is a wasteful number, since it uses less digits than its factorization.

7700000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835611 (or 835609 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 16.

The square root of 7700000020 is about 87749.6439878818. The cubic root of 7700000020 is about 1974.6808239220.

Adding to 7700000020 its reverse (200000077), we get a palindrome (7900000097).

The spelling of 7700000020 in words is "seven billion, seven hundred million, twenty", and thus it is an aban number.