18871705017055 has 16 divisors (see below), whose sum is σ = 25778898238464. Its totient is φ = 13128142619680.

The previous prime is 18871705017007. The next prime is 18871705017083. The reversal of 18871705017055 is 55071050717881.

It is not a de Polignac number, because 18871705017055 - 2¹⁷ = 18871704885983 is a prime.

It is a super-2 number, since 2×18871705017055² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18871705016987 and 18871705017005.

It is a congruent number.

It is an unprimeable number.

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, 7459170679 + ... + 7459173208.

It is an arithmetic number, because the mean of its divisors is an integer number (1611181139904).

Almost surely, 2^{18871705017055} is an apocalyptic number.

18871705017055 is a deficient number, since it is larger than the sum of its proper divisors (6907193221409).

18871705017055 is a wasteful number, since it uses less digits than its factorization.

18871705017055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14918343926.

The product of its (nonzero) digits is 2744000, while the sum is 55.

The spelling of 18871705017055 in words is "eighteen trillion, eight hundred seventy-one billion, seven hundred five million, seventeen thousand, fifty-five".