20786124855 has 32 divisors (see below), whose sum is σ = 34711830720. Its totient is φ = 10611461120.

The previous prime is 20786124851. The next prime is 20786124899. The reversal of 20786124855 is 55842168702.

It is not a de Polignac number, because 20786124855 - 2² = 20786124851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20786124851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 286260 + ... + 351449.

It is an arithmetic number, because the mean of its divisors is an integer number (1084744710).

Almost surely, 2^20786124855 is an apocalyptic number.

20786124855 is a deficient number, since it is larger than the sum of its proper divisors (13925705865).

20786124855 is a wasteful number, since it uses less digits than its factorization.

20786124855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637811.

The product of its (nonzero) digits is 1075200, while the sum is 48.

The spelling of 20786124855 in words is "twenty billion, seven hundred eighty-six million, one hundred twenty-four thousand, eight hundred fifty-five".