19916392 has 24 divisors (see below), whose sum is σ = 37954710. Its totient is φ = 9796800.

The previous prime is 19916387. The next prime is 19916399. The reversal of 19916392 is 29361991.

It can be written as a sum of positive squares in 3 ways, for example, as 18028516 + 1887876 = 4246^2 + 1374^2 .

It is not an unprimeable number, because it can be changed into a prime (19916399) 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, 126778 + ... + 126934.

Almost surely, 2^19916392 is an apocalyptic number.

It is an amenable number.

19916392 is a deficient number, since it is larger than the sum of its proper divisors (18038318).

19916392 is a wasteful number, since it uses less digits than its factorization.

19916392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 260 counting only the distinct ones).

The product of its digits is 26244, while the sum is 40.

The square root of 19916392 is about 4462.7785067153. The cubic root of 19916392 is about 271.0629883133.

The spelling of 19916392 in words is "nineteen million, nine hundred sixteen thousand, three hundred ninety-two".