18662871904405 has 8 divisors (see below), whose sum is σ = 23369161341312. Its totient is φ = 14281154152848.

The previous prime is 18662871904379. The next prime is 18662871904423. The reversal of 18662871904405 is 50440917826681.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18662871904405 - 2¹⁷ = 18662871773333 is a prime.

It is a super-2 number, since 2×18662871904405² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81142921209 + ... + 81142921438.

It is an arithmetic number, because the mean of its divisors is an integer number (2921145167664).

Almost surely, 2^{18662871904405} is an apocalyptic number.

It is an amenable number.

18662871904405 is a deficient number, since it is larger than the sum of its proper divisors (4706289436907).

18662871904405 is a wasteful number, since it uses less digits than its factorization.

18662871904405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162285842675.

The product of its (nonzero) digits is 23224320, while the sum is 61.

The spelling of 18662871904405 in words is "eighteen trillion, six hundred sixty-two billion, eight hundred seventy-one million, nine hundred four thousand, four hundred five".