19996279 has 2 divisors, whose sum is σ = 19996280. Its totient is φ = 19996278.

The previous prime is 19996261. The next prime is 19996297. The reversal of 19996279 is 97269991.

Together with next prime (19996297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (19996261) and next prime (19996297).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19996279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19996219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9998139 + 9998140.

It is an arithmetic number, because the mean of its divisors is an integer number (9998140).

Almost surely, 2^19996279 is an apocalyptic number.

19996279 is a deficient number, since it is larger than the sum of its proper divisors (1).

19996279 is an equidigital number, since it uses as much as digits as its factorization.

19996279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 551124, while the sum is 52.

The square root of 19996279 is about 4471.7199152004. The cubic root of 19996279 is about 271.4249267021.

The spelling of 19996279 in words is "nineteen million, nine hundred ninety-six thousand, two hundred seventy-nine".