20387035185555 has 16 divisors (see below), whose sum is σ = 33744058238880. Its totient is φ = 10498151451648.

The previous prime is 20387035185553. The next prime is 20387035185563. The reversal of 20387035185555 is 55558153078302.

It is not a de Polignac number, because 20387035185555 - 2¹ = 20387035185553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20387035185495 and 20387035185504.

It is not an unprimeable number, because it can be changed into a prime (20387035185553) 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 15 ways as a sum of consecutive naturals, for example, 23433373342 + ... + 23433374211.

It is an arithmetic number, because the mean of its divisors is an integer number (2109003639930).

Almost surely, 2^{20387035185555} is an apocalyptic number.

20387035185555 is a deficient number, since it is larger than the sum of its proper divisors (13357023053325).

20387035185555 is a wasteful number, since it uses less digits than its factorization.

20387035185555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46866747590.

The product of its (nonzero) digits is 25200000, while the sum is 57.

The spelling of 20387035185555 in words is "twenty trillion, three hundred eighty-seven billion, thirty-five million, one hundred eighty-five thousand, five hundred fifty-five".