19487768690926 has 32 divisors (see below), whose sum is σ = 30114011255328. Its totient is φ = 9452604994560.

The previous prime is 19487768690911. The next prime is 19487768691037. The reversal of 19487768690926 is 62909686778491.

It is a Harshad number since it is a multiple of its sum of digits (82).

It is a self number, because there is not a number n which added to its sum of digits gives 19487768690926.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9362161 + ... + 11252803.

It is an arithmetic number, because the mean of its divisors is an integer number (941062851729).

Almost surely, 2^{19487768690926} is an apocalyptic number.

19487768690926 is a deficient number, since it is larger than the sum of its proper divisors (10626242564402).

19487768690926 is a wasteful number, since it uses less digits than its factorization.

19487768690926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891396.

The product of its (nonzero) digits is 3950456832, while the sum is 82.

The spelling of 19487768690926 in words is "nineteen trillion, four hundred eighty-seven billion, seven hundred sixty-eight million, six hundred ninety thousand, nine hundred twenty-six".