20787756488763 has 48 divisors (see below), whose sum is σ = 32084253680640. Its totient is φ = 11929975928640.

The previous prime is 20787756488731. The next prime is 20787756488869. The reversal of 20787756488763 is 36788465778702.

It is not a de Polignac number, because 20787756488763 - 2⁵ = 20787756488731 is a prime.

It is a super-2 number, since 2×20787756488763² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20787756488263) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14077045 + ... + 15483497.

It is an arithmetic number, because the mean of its divisors is an integer number (668421951680).

Almost surely, 2^{20787756488763} is an apocalyptic number.

20787756488763 is a deficient number, since it is larger than the sum of its proper divisors (11296497191877).

20787756488763 is a wasteful number, since it uses less digits than its factorization.

20787756488763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408640 (or 1408629 counting only the distinct ones).

The product of its (nonzero) digits is 5310627840, while the sum is 78.

The spelling of 20787756488763 in words is "twenty trillion, seven hundred eighty-seven billion, seven hundred fifty-six million, four hundred eighty-eight thousand, seven hundred sixty-three".