20875879236681 has 72 divisors (see below), whose sum is σ = 35224506165888. Its totient is φ = 11879008344000.

The previous prime is 20875879236623. The next prime is 20875879236697. The reversal of 20875879236681 is 18663297857802.

20875879236681 is a `hidden beast` number, since 2 + 0 + 8 + 7 + 587 + 9 + 2 + 36 + 6 + 8 + 1 = 666.

It is not a de Polignac number, because 20875879236681 - 2³⁸ = 20601001329737 is a prime.

It is a super-2 number, since 2×20875879236681² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20875879236581) 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 71 ways as a sum of consecutive naturals, for example, 240293191 + ... + 240380051.

It is an arithmetic number, because the mean of its divisors is an integer number (489229252304).

Almost surely, 2^{20875879236681} is an apocalyptic number.

20875879236681 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20875879236681 is a deficient number, since it is larger than the sum of its proper divisors (14348626929207).

20875879236681 is a wasteful number, since it uses less digits than its factorization.

20875879236681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89163 (or 89153 counting only the distinct ones).

The product of its (nonzero) digits is 487710720, while the sum is 72.

The spelling of 20875879236681 in words is "twenty trillion, eight hundred seventy-five billion, eight hundred seventy-nine million, two hundred thirty-six thousand, six hundred eighty-one".