18481887138435 has 32 divisors (see below), whose sum is σ = 33827065052160. Its totient is φ = 8440959120768.

The previous prime is 18481887138371. The next prime is 18481887138527. The reversal of 18481887138435 is 53483178818481.

It is not a de Polignac number, because 18481887138435 - 2⁶ = 18481887138371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18481887138435.

It is an unprimeable number.

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, 82216087 + ... + 82440576.

It is an arithmetic number, because the mean of its divisors is an integer number (1057095782880).

Almost surely, 2^{18481887138435} is an apocalyptic number.

18481887138435 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18481887138435 is a deficient number, since it is larger than the sum of its proper divisors (15345177913725).

18481887138435 is a wasteful number, since it uses less digits than its factorization.

18481887138435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164657747.

The product of its digits is 165150720, while the sum is 69.

The spelling of 18481887138435 in words is "eighteen trillion, four hundred eighty-one billion, eight hundred eighty-seven million, one hundred thirty-eight thousand, four hundred thirty-five".