19618603641424 has 40 divisors (see below), whose sum is σ = 38541691238120. Its totient is φ = 9672430123008.

The previous prime is 19618603641409. The next prime is 19618603641451. The reversal of 19618603641424 is 42414630681691.

It can be written as a sum of positive squares in 4 ways, for example, as 546517175824 + 19072086465600 = 739268^2 + 4367160^2 .

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, 2362132 + ... + 6694540.

It is an arithmetic number, because the mean of its divisors is an integer number (963542280953).

Almost surely, 2^{19618603641424} is an apocalyptic number.

It is an amenable number.

19618603641424 is a deficient number, since it is larger than the sum of its proper divisors (18923087596696).

19618603641424 is a wasteful number, since it uses less digits than its factorization.

19618603641424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4336367 (or 4336361 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 55.

The spelling of 19618603641424 in words is "nineteen trillion, six hundred eighteen billion, six hundred three million, six hundred forty-one thousand, four hundred twenty-four".