18684660421144 has 32 divisors (see below), whose sum is σ = 37094764477680. Its totient is φ = 8792729688064.

The previous prime is 18684660421057. The next prime is 18684660421153. The reversal of 18684660421144 is 44112406648681.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 32845824 + ... + 33409840.

Almost surely, 2^{18684660421144} is an apocalyptic number.

It is an amenable number.

18684660421144 is a deficient number, since it is larger than the sum of its proper divisors (18410104056536).

18684660421144 is a wasteful number, since it uses less digits than its factorization.

18684660421144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807627 (or 807623 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 55.

The spelling of 18684660421144 in words is "eighteen trillion, six hundred eighty-four billion, six hundred sixty million, four hundred twenty-one thousand, one hundred forty-four".