19491996 has 24 divisors (see below), whose sum is σ = 48157200. Its totient is φ = 6115072.

The previous prime is 19491977. The next prime is 19492003. The reversal of 19491996 is 69919491.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47571 + ... + 47978.

It is an arithmetic number, because the mean of its divisors is an integer number (2006550).

Almost surely, 2^19491996 is an apocalyptic number.

It is an amenable number.

19491996 is an abundant number, since it is smaller than the sum of its proper divisors (28665204).

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

19491996 is a wasteful number, since it uses less digits than its factorization.

19491996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95573 (or 95571 counting only the distinct ones).

The product of its digits is 157464, while the sum is 48.

The square root of 19491996 is about 4414.9740656090. The cubic root of 19491996 is about 269.1237988691.

The spelling of 19491996 in words is "nineteen million, four hundred ninety-one thousand, nine hundred ninety-six".