19379916 has 18 divisors (see below), whose sum is σ = 48988212. Its totient is φ = 6459960.

The previous prime is 19379911. The next prime is 19379939. The reversal of 19379916 is 61997391.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×19379916² = 751162288334112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19379911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 269130 + ... + 269201.

Almost surely, 2^19379916 is an apocalyptic number.

It is an amenable number.

19379916 is an abundant number, since it is smaller than the sum of its proper divisors (29608296).

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

19379916 is a wasteful number, since it uses less digits than its factorization.

19379916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538341 (or 538336 counting only the distinct ones).

The product of its digits is 91854, while the sum is 45.

The square root of 19379916 is about 4402.2626000728. The cubic root of 19379916 is about 268.6069817017.

The spelling of 19379916 in words is "nineteen million, three hundred seventy-nine thousand, nine hundred sixteen".