20764876785 has 16 divisors (see below), whose sum is σ = 34295539200. Its totient is φ = 10717355520.

The previous prime is 20764876771. The next prime is 20764876787. The reversal of 20764876785 is 58767846702.

It is a happy number.

It is not a de Polignac number, because 20764876785 - 2⁹ = 20764876273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20764876787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22327360 + ... + 22328289.

It is an arithmetic number, because the mean of its divisors is an integer number (2143471200).

Almost surely, 2^20764876785 is an apocalyptic number.

It is an amenable number.

20764876785 is a deficient number, since it is larger than the sum of its proper divisors (13530662415).

20764876785 is a wasteful number, since it uses less digits than its factorization.

20764876785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44655688.

The product of its (nonzero) digits is 31610880, while the sum is 60.

The spelling of 20764876785 in words is "twenty billion, seven hundred sixty-four million, eight hundred seventy-six thousand, seven hundred eighty-five".