19391996 has 24 divisors (see below), whose sum is σ = 37537920. Its totient is φ = 8707392.

The previous prime is 19391993. The next prime is 19392031. The reversal of 19391996 is 69919391.

It is a self number, because there is not a number n which added to its sum of digits gives 19391996.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19391993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3116 + ... + 6963.

It is an arithmetic number, because the mean of its divisors is an integer number (1564080).

Almost surely, 2^19391996 is an apocalyptic number.

It is an amenable number.

19391996 is a deficient number, since it is larger than the sum of its proper divisors (18145924).

19391996 is a wasteful number, since it uses less digits than its factorization.

19391996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10133 (or 10131 counting only the distinct ones).

The product of its digits is 118098, while the sum is 47.

The square root of 19391996 is about 4403.6344080770. The cubic root of 19391996 is about 268.6627799895.

The spelling of 19391996 in words is "nineteen million, three hundred ninety-one thousand, nine hundred ninety-six".