20000747775 has 96 divisors (see below), whose sum is σ = 36370529280. Its totient is φ = 9657733120.

The previous prime is 20000747749. The next prime is 20000747777. The reversal of 20000747775 is 57774700002.

It is a Cunningham number, because it is equal to 141424²-1.

It is not a de Polignac number, because 20000747775 - 2⁷ = 20000747647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000747777) 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 95 ways as a sum of consecutive naturals, for example, 3532747 + ... + 3538403.

It is an arithmetic number, because the mean of its divisors is an integer number (378859680).

Almost surely, 2^20000747775 is an apocalyptic number.

20000747775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20000747775 is a deficient number, since it is larger than the sum of its proper divisors (16369781505).

20000747775 is a wasteful number, since it uses less digits than its factorization.

20000747775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5793 (or 5788 counting only the distinct ones).

The product of its (nonzero) digits is 96040, while the sum is 39.

The spelling of 20000747775 in words is "twenty billion, seven hundred forty-seven thousand, seven hundred seventy-five".