18974149609485 has 32 divisors (see below), whose sum is σ = 34948840349952. Its totient is φ = 8610583841280.

The previous prime is 18974149609483. The next prime is 18974149609501. The reversal of 18974149609485 is 58490694147981.

It is not a de Polignac number, because 18974149609485 - 2¹ = 18974149609483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18974149609483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 659497246 + ... + 659526015.

It is an arithmetic number, because the mean of its divisors is an integer number (1092151260936).

Almost surely, 2^{18974149609485} is an apocalyptic number.

18974149609485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18974149609485 is a deficient number, since it is larger than the sum of its proper divisors (15974690740467).

18974149609485 is a wasteful number, since it uses less digits than its factorization.

18974149609485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319023413.

The product of its (nonzero) digits is 627056640, while the sum is 75.

The spelling of 18974149609485 in words is "eighteen trillion, nine hundred seventy-four billion, one hundred forty-nine million, six hundred nine thousand, four hundred eighty-five".