19493870916 has 48 divisors (see below), whose sum is σ = 49418135424. Its totient is φ = 5945028096.

The previous prime is 19493870897. The next prime is 19493870941. The reversal of 19493870916 is 61907839491.

It is a super-2 number, since 2×19493870916² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 535296 + ... + 570551.

It is an arithmetic number, because the mean of its divisors is an integer number (1029544488).

Almost surely, 2^19493870916 is an apocalyptic number.

It is an amenable number.

19493870916 is an abundant number, since it is smaller than the sum of its proper divisors (29924264508).

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

19493870916 is a wasteful number, since it uses less digits than its factorization.

19493870916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105980 (or 1105978 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 57.

The spelling of 19493870916 in words is "nineteen billion, four hundred ninety-three million, eight hundred seventy thousand, nine hundred sixteen".