19491264096 has 36 divisors (see below), whose sum is σ = 51168159252. Its totient is φ = 6496632064.

The previous prime is 19491264083. The next prime is 19491264101. The reversal of 19491264096 is 69046219491.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1360780 + ... + 1375028.

It is an arithmetic number, because the mean of its divisors is an integer number (1421337757).

Almost surely, 2^19491264096 is an apocalyptic number.

19491264096 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19491264096 is an abundant number, since it is smaller than the sum of its proper divisors (31676895156).

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

19491264096 is an frugal number, since it uses more digits than its factorization.

19491264096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28511 (or 14254 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 51.

The spelling of 19491264096 in words is "nineteen billion, four hundred ninety-one million, two hundred sixty-four thousand, ninety-six".