20871287486763 has 48 divisors (see below), whose sum is σ = 34277520466944. Its totient is φ = 11224401404160.

The previous prime is 20871287486747. The next prime is 20871287486779. The reversal of 20871287486763 is 36768478217802.

It is an interprime number because it is at equal distance from previous prime (20871287486747) and next prime (20871287486779).

It is not a de Polignac number, because 20871287486763 - 2⁴ = 20871287486747 is a prime.

It is a super-2 number, since 2×20871287486763² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20871287486363) 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, 60821998 + ... + 61164188.

It is an arithmetic number, because the mean of its divisors is an integer number (714115009728).

Almost surely, 2^{20871287486763} is an apocalyptic number.

20871287486763 is a deficient number, since it is larger than the sum of its proper divisors (13406232980181).

20871287486763 is a wasteful number, since it uses less digits than its factorization.

20871287486763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366632 (or 366625 counting only the distinct ones).

The product of its (nonzero) digits is 303464448, while the sum is 69.

The spelling of 20871287486763 in words is "twenty trillion, eight hundred seventy-one billion, two hundred eighty-seven million, four hundred eighty-six thousand, seven hundred sixty-three".