19979056 has 10 divisors (see below), whose sum is σ = 38709452. Its totient is φ = 9989520.

The previous prime is 19979041. The next prime is 19979059. The reversal of 19979056 is 65097991.

It is a super-2 number, since 2×19979056² = 798325357302272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19978997 and 19979015.

It is not an unprimeable number, because it can be changed into a prime (19979059) by changing a digit.

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 as a sum of consecutive naturals, namely, 624330 + ... + 624361.

Almost surely, 2^19979056 is an apocalyptic number.

19979056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19979056 is a deficient number, since it is larger than the sum of its proper divisors (18730396).

19979056 is a wasteful number, since it uses less digits than its factorization.

19979056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248699 (or 1248693 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 46.

The square root of 19979056 is about 4469.7937312587. The cubic root of 19979056 is about 271.3469772948.

The spelling of 19979056 in words is "nineteen million, nine hundred seventy-nine thousand, fifty-six".