20787775800267 has 16 divisors (see below), whose sum is σ = 31679121378560. Its totient is φ = 11877787540512.

The previous prime is 20787775800203. The next prime is 20787775800329. The reversal of 20787775800267 is 76200857778702.

It is not a de Polignac number, because 20787775800267 - 2⁶ = 20787775800203 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20787775800198 and 20787775800207.

It is not an unprimeable number, because it can be changed into a prime (20787775800367) 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, 38957368 + ... + 39487365.

It is an arithmetic number, because the mean of its divisors is an integer number (1979945086160).

Almost surely, 2^{20787775800267} is an apocalyptic number.

20787775800267 is a deficient number, since it is larger than the sum of its proper divisors (10891345578293).

20787775800267 is a wasteful number, since it uses less digits than its factorization.

20787775800267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78457362.

The product of its (nonzero) digits is 129077760, while the sum is 66.

The spelling of 20787775800267 in words is "twenty trillion, seven hundred eighty-seven billion, seven hundred seventy-five million, eight hundred thousand, two hundred sixty-seven".