18861054673605 has 16 divisors (see below), whose sum is σ = 30249710608320. Its totient is φ = 10035221449088.

The previous prime is 18861054673603. The next prime is 18861054673631. The reversal of 18861054673605 is 50637645016881.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18861054673605 - 2¹ = 18861054673603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18861054673603) 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, 1500475392 + ... + 1500487961.

It is an arithmetic number, because the mean of its divisors is an integer number (1890606913020).

Almost surely, 2^{18861054673605} is an apocalyptic number.

18861054673605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18861054673605 is a deficient number, since it is larger than the sum of its proper divisors (11388655934715).

18861054673605 is a wasteful number, since it uses less digits than its factorization.

18861054673605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3000963780.

The product of its (nonzero) digits is 29030400, while the sum is 60.

The spelling of 18861054673605 in words is "eighteen trillion, eight hundred sixty-one billion, fifty-four million, six hundred seventy-three thousand, six hundred five".