19320916 has 6 divisors (see below), whose sum is σ = 33811610. Its totient is φ = 9660456.

The previous prime is 19320887. The next prime is 19320937. The reversal of 19320916 is 61902391.

It can be written as a sum of positive squares in only one way, i.e., 17189316 + 2131600 = 4146^2 + 1460^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2415111 + ... + 2415118.

Almost surely, 2^19320916 is an apocalyptic number.

It is an amenable number.

19320916 is a deficient number, since it is larger than the sum of its proper divisors (14490694).

19320916 is a wasteful number, since it uses less digits than its factorization.

19320916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830233 (or 4830231 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 19320916 is about 4395.5563925401. The cubic root of 19320916 is about 268.3341232525.

The spelling of 19320916 in words is "nineteen million, three hundred twenty thousand, nine hundred sixteen".