19919416 has 16 divisors (see below), whose sum is σ = 40744440. Its totient is φ = 9054240.

The previous prime is 19919413. The next prime is 19919443. The reversal of 19919416 is 61491991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19919413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113091 + ... + 113266.

Almost surely, 2^19919416 is an apocalyptic number.

It is an amenable number.

19919416 is an abundant number, since it is smaller than the sum of its proper divisors (20825024).

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

19919416 is a wasteful number, since it uses less digits than its factorization.

19919416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226374 (or 226370 counting only the distinct ones).

The product of its digits is 17496, while the sum is 40.

The square root of 19919416 is about 4463.1172962404. The cubic root of 19919416 is about 271.0767065442.

The spelling of 19919416 in words is "nineteen million, nine hundred nineteen thousand, four hundred sixteen".