19996679 has 8 divisors (see below), whose sum is σ = 20254080. Its totient is φ = 19741176.

The previous prime is 19996663. The next prime is 19996733. The reversal of 19996679 is 97669991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19996679 - 2⁴ = 19996663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19996649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36284 + ... + 36830.

It is an arithmetic number, because the mean of its divisors is an integer number (2531760).

Almost surely, 2^19996679 is an apocalyptic number.

19996679 is a deficient number, since it is larger than the sum of its proper divisors (257401).

19996679 is a wasteful number, since it uses less digits than its factorization.

19996679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949.

The product of its digits is 1653372, while the sum is 56.

The square root of 19996679 is about 4471.7646404971. The cubic root of 19996679 is about 271.4267365263.

The spelling of 19996679 in words is "nineteen million, nine hundred ninety-six thousand, six hundred seventy-nine".