19491396 has 24 divisors (see below), whose sum is σ = 47457984. Its totient is φ = 6214560.

The previous prime is 19491389. The next prime is 19491403. The reversal of 19491396 is 69319491.

It is an interprime number because it is at equal distance from previous prime (19491389) and next prime (19491403).

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, 35035 + ... + 35586.

It is an arithmetic number, because the mean of its divisors is an integer number (1977416).

Almost surely, 2^19491396 is an apocalyptic number.

It is an amenable number.

19491396 is an abundant number, since it is smaller than the sum of its proper divisors (27966588).

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

19491396 is a wasteful number, since it uses less digits than its factorization.

19491396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70651 (or 70649 counting only the distinct ones).

The product of its digits is 52488, while the sum is 42.

The square root of 19491396 is about 4414.9061145170. The cubic root of 19491396 is about 269.1210374632.

The spelling of 19491396 in words is "nineteen million, four hundred ninety-one thousand, three hundred ninety-six".