20076764243 has 4 divisors (see below), whose sum is σ = 20084904840. Its totient is φ = 20068623648.

The previous prime is 20076764237. The next prime is 20076764291. The reversal of 20076764243 is 34246767002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20076764243 - 2⁶ = 20076764179 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20076764243.

It is not an unprimeable number, because it can be changed into a prime (20076764843) 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 3 ways as a sum of consecutive naturals, for example, 4066598 + ... + 4071531.

It is an arithmetic number, because the mean of its divisors is an integer number (5021226210).

Almost surely, 2^20076764243 is an apocalyptic number.

20076764243 is a deficient number, since it is larger than the sum of its proper divisors (8140597).

20076764243 is an equidigital number, since it uses as much as digits as its factorization.

20076764243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8140596.

The product of its (nonzero) digits is 338688, while the sum is 41.

The spelling of 20076764243 in words is "twenty billion, seventy-six million, seven hundred sixty-four thousand, two hundred forty-three".