18671638408522 has 96 divisors (see below), whose sum is σ = 32353885577664. Its totient is φ = 8009659123200.

The previous prime is 18671638408517. The next prime is 18671638408537. The reversal of 18671638408522 is 22580483617681.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 213583273 + ... + 213670675.

It is an arithmetic number, because the mean of its divisors is an integer number (337019641434).

Almost surely, 2^{18671638408522} is an apocalyptic number.

18671638408522 is a deficient number, since it is larger than the sum of its proper divisors (13682247169142).

18671638408522 is a wasteful number, since it uses less digits than its factorization.

18671638408522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87704 (or 87667 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 61.

The spelling of 18671638408522 in words is "eighteen trillion, six hundred seventy-one billion, six hundred thirty-eight million, four hundred eight thousand, five hundred twenty-two".