19979316 has 36 divisors (see below), whose sum is σ = 57718752. Its totient is φ = 5708304.

The previous prime is 19979299. The next prime is 19979327. The reversal of 19979316 is 61397991.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39390 + ... + 39893.

Almost surely, 2^19979316 is an apocalyptic number.

It is an amenable number.

19979316 is an abundant number, since it is smaller than the sum of its proper divisors (37739436).

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

19979316 is a wasteful number, since it uses less digits than its factorization.

19979316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79300 (or 79295 counting only the distinct ones).

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

The square root of 19979316 is about 4469.8228152803. The cubic root of 19979316 is about 271.3481543592.

It can be divided in two parts, 199793 and 16, that added together give a square (199809 = 447²).

The spelling of 19979316 in words is "nineteen million, nine hundred seventy-nine thousand, three hundred sixteen".