19396916 has 48 divisors (see below), whose sum is σ = 42964992. Its totient is φ = 7442400.

The previous prime is 19396907. The next prime is 19396921. The reversal of 19396916 is 61969391.

It is a happy number.

It is a super-2 number, since 2×19396916² = 752480700622112, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21425 + ... + 22311.

It is an arithmetic number, because the mean of its divisors is an integer number (895104).

Almost surely, 2^19396916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19396916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21482496).

19396916 is an abundant number, since it is smaller than the sum of its proper divisors (23568076).

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

19396916 is a wasteful number, since it uses less digits than its factorization.

19396916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980 (or 978 counting only the distinct ones).

The product of its digits is 78732, while the sum is 44.

The square root of 19396916 is about 4404.1930021288. The cubic root of 19396916 is about 268.6854991413.

The spelling of 19396916 in words is "nineteen million, three hundred ninety-six thousand, nine hundred sixteen".