19996894290408 has 64 divisors (see below), whose sum is σ = 57146275440000. Its totient is φ = 5712169193472.

The previous prime is 19996894290403. The next prime is 19996894290421. The reversal of 19996894290408 is 80409249869991.

It is not an unprimeable number, because it can be changed into a prime (19996894290403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12020553 + ... + 13582616.

It is an arithmetic number, because the mean of its divisors is an integer number (892910553750).

Almost surely, 2^{19996894290408} is an apocalyptic number.

It is an amenable number.

19996894290408 is an abundant number, since it is smaller than the sum of its proper divisors (37149381149592).

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

19996894290408 is a wasteful number, since it uses less digits than its factorization.

19996894290408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25607834 (or 25607830 counting only the distinct ones).

The product of its (nonzero) digits is 725594112, while the sum is 78.

The spelling of 19996894290408 in words is "nineteen trillion, nine hundred ninety-six billion, eight hundred ninety-four million, two hundred ninety thousand, four hundred eight".