19428969678018 has 32 divisors (see below), whose sum is σ = 38885018250240. Its totient is φ = 6471810684240.

The previous prime is 19428969678017. The next prime is 19428969678023. The reversal of 19428969678018 is 81087696982491.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19428969678017) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 143511363 + ... + 143646681.

It is an arithmetic number, because the mean of its divisors is an integer number (1215156820320).

Almost surely, 2^{19428969678018} is an apocalyptic number.

19428969678018 is an abundant number, since it is smaller than the sum of its proper divisors (19456048572222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19428969678018 is a wasteful number, since it uses less digits than its factorization.

19428969678018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151822.

The product of its (nonzero) digits is 752467968, while the sum is 78.

The spelling of 19428969678018 in words is "nineteen trillion, four hundred twenty-eight billion, nine hundred sixty-nine million, six hundred seventy-eight thousand, eighteen".