19916038 has 4 divisors (see below), whose sum is σ = 29874060. Its totient is φ = 9958018.

The previous prime is 19916033. The next prime is 19916041. The reversal of 19916038 is 83061991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83061991 = 131 ⋅634061.

It is a junction number, because it is equal to n+sod(n) for n = 19915988 and 19916006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19916033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4979008 + ... + 4979011.

It is an arithmetic number, because the mean of its divisors is an integer number (7468515).

Almost surely, 2^19916038 is an apocalyptic number.

19916038 is a deficient number, since it is larger than the sum of its proper divisors (9958022).

19916038 is an equidigital number, since it uses as much as digits as its factorization.

19916038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9958021.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 19916038 is about 4462.7388451488. The cubic root of 19916038 is about 271.0613823185.

The spelling of 19916038 in words is "nineteen million, nine hundred sixteen thousand, thirty-eight".